This option is correct because xylitol is a white odourless crystalline powder that has been used as a sweetening agent in food for over 40 years. The substance occurs naturally in many fruits and vegetables and sorbitol occurs naturally in various fruits and berries. First discovered in 1872, it is today commercially produced by the hydrogenation of glucose and is available in both liquid and crystalline forms. This pair represents natural sweeteners.

This option is correct because steviol glycosides are responsible for the sweet taste of the leaves of the stevia plant (Stevia rebaudiana Bertoni). These compounds range in sweetness from 40 to 300 times sweeter than sucrose. They are heat-stable, pH-stable, and do not ferment. They also do not induce a glycemic response when ingested, making them attractive as natural sweeteners to diabetics and others on carbohydrate-controlled diets.

This option is correct because emergency contraceptive pills (sometimes referred to as emergency hormonal contraception (EHC) in Great Britain) may contain higher doses of the same hormones (estrogens, progestins, or both) found in regular combined oral contraceptive pills. Taken after unprotected sexual intercourse or contraceptive failure, such higher doses may prevent pregnancy from occurring. Some examples are - progestin-only (levonorgestrel) pills, and antiprogestin (ulipristal acetate or mifepristone) pills etc.

This option is correct because neotame is an artificial sweetener made by NutraSweet that is between 7000 and 13,000 times sweeter than sucrose. It is moderately heat-stable, extremely potent, rapidly metabolized, completely eliminated, and does not appear to accumulate in the body.

This option is correct because monellin is a sweet protein, which was discovered in 1969 in the fruit of the West African shrub known as serendipity berry (Dioscoreophyllum cumminsii) and it was first reported as a carbohydrate.

This option is correct because all are correctly matched. Alitame is 2000 times sweeter than sugar. Neotame is 7000 to 13,000 times sweeter than sugar. Sucralose has sweetness value of 600. Saccharin is 550 times sweeter than sugar.

This option is correct because curculin is a sweet protein that was discovered and isolated in 1990 from the fruit of Curculigo latifolia. It has sweetness value is 550. Mabinlins are sweet-tasting proteins extracted from the seed of Mabinlang (Capparis masaikai Levl.). Mabinlin has the sweetness value of 100.

This option is correct because norethindrone is an example of synthetic progesterone derivative most widely used as antifertility drug. The estrogen derivative which is used in combination with progesterone derivative is ethynylestradiol (novestrol).

This option is wrong because alitame and sucralose are not broken down by the body and are non-caloric.

This option is correct because miraculin is a natural sugar substitute, a glycoprotein extracted from the fruit of Synsepalum dulcificum. The berry is also known as the miracle fruit.

This option is correct because sucralose is trichloro derivative of sucrose. Its appearance and taste are like sugar. It is stable at cooking temperature.

Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. In the European Union, it is codified as E951. Aspartame is a methyl ester of the aminosuccinic acid/phenylalanine dipeptide.

This option is correct because NutraSweet (aspartame) is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages.

This option is correct because acesulfame-K is a synthetic compound that acts as a synergist with other sweeteners. Its sweetness value is 200.

This option is correct because sucralose is trichloro derivative of sucrose. Its appearance and taste are like sugar. It is stable at cooking temperature. It does not provide calories and thus, is used in the making of sweets for diabetic patients.