1) Guava- Opposite phyllotaxy

Veins provide support for the leaf and transport both water and minerals (via xylem) and food energy (via phloem) through the leaf and on to the rest of the plant and hence are conducting in their function.

Parallel venation, in which veins run parallel to one another from base to the tips of the leaf. Reticulate venation in which veins are arranged in a net like a pattern on both sides.

• Reticulate venation is found in dicot leaves, while in monocot. Reticulate venation is found in dicot leaves, while in monocot leaves venation is of parallel type.
•  Monocot having reticulate venation, e.g., Smilax, Colocasia, Dioscorea.
• Hence, The monocotyledons showing reticulate venation is Smilax and Dioscorea.
• So, the correct answer is 'Both A and B

• Parallel venation refers to a pattern in the veins of a leaf where the secondary veins run parallel to each other off of a central, perpendicular primary vein. 
• The best example for parallel venation is banana. Some of the monocotyledons like bajra, sorghum, maize, wheat, rice, grasses, coconut, palm and then dicots like mango also the examples of parallel venation.
• Hence, The monocotyledonous leaf shows Parallel venation.
• So, the correct answer is 'Parallel'.

Venation is the arrangement of veins in a leaf. In reticulated venation, veins are interconnected and form a web-like network. There is a prominent vein called the midrib from which many small veins arise which finally form a net-like structure in the lamina. This kind of venation is seen in dicots. for example, mango.

If the stomata and waxy cuticle are present on submerged leaves, they may disturb the buoyancy of the leaf. Hence, the stomata are found in the upper surface of the submerged plant. The stomata in the leaf are open majority of the time because there is no need for water conservation.

Venation is the arrangement of veins in a leaf. In reticulated venation, veins are interconnected and form a web-like network. There is a prominent vein called the midrib from which many small veins arise which finally form a net-like structure in the lamina. This kind of venation is seen in dicots. for example, mango. 

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, hibiscus, papaya, ficus. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, Zea (maize). Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation.

Venation is the arrangement of veins on the leaves. It is basically of 2 types, reticulate and parallel. Reticulate venation involves irregular distribution of veins to form a network. Parallel venation involves the veins running parallel to each other. In pinnate or unicostate venation, the lamina has a single principal vein or midrib. It produces lateral veins. In palmate or multicostate venation, lamina has more than one principal vein. In Musa, the venation is unicostate parallel. 

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, Hibiscus, papaya, Ficus, Bambusa. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, plum, Zea (maize). Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation. However, there are exceptions in monocots like Smilax and Colocasia. They show reticulate venation. Thus, the correct answer is 'Smilax.'

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, hibiscus, papaya, ficus. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, Zea (maize). Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation.

Cajlakhjan, working on floral initiation, coined the term florigen for the flowering hormone thought to be present in photoinduced leaves and plants. It is supposed that leaf prepare a special compound A on receiving $CO _{2}$. A on turn produces B in dark and is followed by formation of C (florigen). The florigen translocated from vegetative meristems to floral initiation.

Veins in leaves are made up of xylem and phloem. It is useful in providing mechanical support to the leaf. It also helps in transport of both water and minerals via xylem tissue and transport of organic nutrients via phloem tissue to the rest of the plant.

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, hibiscus, papaya, ficus. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa. Leaves of monocot plants generally show parallel venation and leaves of dicot plants generally show reticulate venation.

Parallel venation means the veins present within the leaves are arranged parallel to each other. These veins never join any other veins. No branching is seen in parallel venation. All the monocots are parallelly venated whereas the dicots have reticulate venation except Corymbium and Calophyllum which are parallelly venated. So, the correct answer is 'Corymbium'.

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, hibiscus, papaya, ficus. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa. Leaves of monocot plants generally show parallel venation and leaves of dicot plants generally show reticulate venation.

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, hibiscus, papaya, Mangifera. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, Oryza. Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation. Thus, the correct answer is 'Mangifera.'

Venation is the arrangement of veins on the leaves. It is basically of 2 types, reticulate and parallel. Reticulate venation involves irregular distribution of veins to form a network. Parallel venation involves the veins running parallel to each other. Pinnate venation is also called as unicostate venation. In this, the lamina has a single principal vein or midrib. It produces lateral veins. Palmate venation is also called as multicostate venation. In this, lamina has more than one principal vein. 

Venation is the arrangement of veins on the leaves. It is basically of 2 types, reticulate and parallel. Reticulate venation involves irregular distribution of veins to form a network. Parallel venation involves the veins running parallel to each other. In pinnate or unicostate venation, the lamina has a single principal vein or midrib. It produces lateral veins. In palmate or multicostate venation, lamina has more than one principal vein. In Grasses and Palms, the venation is multicostate parallel. 

Pinnate or unicostate parallel venation: In such venation, lamina has a single prominent vein or midrib extending from the base to the apex of the lamina, e.g., Banana etc.

Anisophylly is term commonly referred to explain plant having pairs of leaves with the significant difference in their size between two leaves. Goldfussia (Strobilanthes anisophyllus) is an evergreen shrub. It has glossy, dark green leaves of unequal size, which are stained blackish purple on both sides. Mauve flowers appear in spring and intermittently throughout the year. Thus, anisophylly is observed in Strobilanthes.

The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, Hibiscus, papaya, Ficus, Bambusa. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, plum, Zea (maize). Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation. However, there are exceptions in dicots  like Corymbium, Calophyllum, Eryngium. They show parallel venation. 

Reticulate venation is a characteristic of dicots while parallel venation is of monocots. But there are some exceptions as some dicot plants show parallel venation, e.g., Calophyllum, Corymbium, etc., and reticulate venation is also shown by some monocot plant e.g., Alocasia, Smilax, etc.

Venation is the arrangement of veins in a leaf. In reticulated venation, veins are interconnected and form a web-like network. There is a prominent vein called the midrib from which many small veins arise which finally form a net like structure in the lamina. This kind of venation is seen in dicots.

Venation is the arrangement of veins in a leaf. Parallel venation is where the secondary veins run parallel to each other and are connected laterally by minute and straight veinlets. This type of venation is mostly seen in monocots.

In case of parallel venation, the veins run parallel to each other and network is not formed. This type of venation is the characteristic feature of monocots. There are few exceptions, e.g., Smilax, Colocasia, Alocasia, Dioscorea, etc.
Correct option is D.