Which of the following is not an artificial sweetener?

Which amongst the following is not a pesticide?

One of the most widely used drugs in medicine,Iodex,is

Match List-$I$ with List-$II$.

List-$I$ (Drug class)	List-$II$ (Drug molecule)
$(a)$ Antacids	$(i)$ Salvarsan
$(b)$ Antihistamines	$(ii)$ Morphine
$(c)$ Analgesics	$(iii)$ Cimetidine
$(d)$ Antimicrobials	$(iv)$ Seldane

Choose the correct answer from the options given below:

An artificial sweetener $X$ is a halogen-containing compound and artificial sweetener $Y$ is a sulphur-containing compound. $X$ and $Y$ respectively are:

Penicillin is