Pick the correct statement among the following:

Which of the following statements are correct?
$a$. Aspartame is sweeter than saccharin
$b$. Shaving soaps contain glycerol to prevent drying
$c$. Salt of sorbic acid is used as a food preservative
$d$. Norethindrone is an example of an antifertility drug

Structurally,a biodegradable detergent should contain:

Match List-$I$ with List-$II$ :

List-$I$ (Chemical)	List-$II$ (Used as)
$(a)$. Sucralose	$(i)$. Synthetic detergent
$(b)$. Glyceryl ester of stearic acid	$(ii)$. Artificial sweetener
$(c)$. Sodium benzoate	$(iii)$. Antiseptic
$(d)$. Bithionol	$(iv)$. Food preservative

Choose the correct match:

Which of the following statements are not correct?
$a$) Antihistamine also functions as an antacid
$b$) The shape of an active site of an enzyme does not change when the drug binds to an allosteric site
$c$) Chemical messengers communicate the message between two neurons
$d$) Potassium soaps are hard,while sodium soaps are soft to skin
The correct answer is

Consider the following statements:
Statement-$I$: Shaving soaps contain glycerol to prevent rapid drying.
Statement-$II$: Laundry soaps contain sodium rosinate or sodium silicate as fillers,not sodium carbonate.
Correct answer is: