There are several records of very old yet viable seeds. The oldest one is of a lupine(Lupnius arcticus) excavated from Arctic Tundra. Seeds of Lupinus arcticus, atleast $10,000$ years old were found in lemming burrows deeply buried in permanently frozen silt of Pleistocene age in ungladated central Yuzon. They readily germinated in the laboratory and have since grown into normal healthy plants.

Wind dispersal of seeds do not ensure a coverage of larger distance and it also depends upon the morphology of seed as well. Maple seeds are samaras that mean they have a wing like structure and is also called wind seed but is not able to cover a great distance as it does not blow with the wind but flutter on the ground.

1. Cucumber needs insects like bees or other insects to disperse their seeds.
2. Balsam seeds use explosion mechanism for seed dispersal.T he fruits are dry and light and easily ruptured even touch by hands.
3. Xanthium also uses animals for seed dispersal the seed stuck to the body of animals and are very tough to remove.
4. Calotropis widely use bees as the carrier for the dispersal of seeds.

The seeds or fruits that are dispersed by wind generally are small and light. However, there are certain other adaptions also seen in it. Moringa (drumstick) seeds have wing-like structures that aid in their dispersal. Other seeds which have similar structure are Cinchona and Pinus. Thus, the correct answer is option A.

Pipal tree is the dwelling place of birds. The birds consuming the fruit digest the freshly part and eject the undigested seed along with the undigested matter.

Dispersal of seeds in poppy occurs by censer mechanism. In this mechanism, the seeds are scattered after dehiscence of fruit occur when it is shaken by the wind. 

In pollination, pollinators play a major role and different plants adopt different methods to pollinate themselves.

Bacterial blight of rice is a seed borne disease which is transmitted to paddy. Seedlings when raised under high humid conditions. This disease is caused by Xanthomonas oryzae.