Which one of the following is an example of artificial sweetner?

We need to identify which of the given compounds is an artificial sweetener. Option A: Bithional — Bithional (bithionol) is an antiseptic compound used in medicated soaps, so it is not a sweetener. Option B: Alitame — Alitame is an artificial sweetener formed from the amino acids L-aspartic acid and D-alanine connected to a novel amine; it is about 2000 times sweeter than sucrose and is used as a sugar substitute. Option C: Lactose — Lactose is a natural sugar (disaccharide) found in milk, composed of glucose and galactose, and is not an artificial sweetener. Option D: Salvarsan — Salvarsan is an antimicrobial drug (organoarsenic compound) historically used to treat syphilis and is not a sweetener.

Among the given options, only Option B: Alitame is an artificial sweetener.