$.........$ is a potent vasodilator.

Assertion : The addition of $BHA$ to butter increases its storage life from months to years.
Reason : Butylated hydroxy anisole $(BHA)$ is an antioxidant.

Which of the following statements are true for saccharin?
$(A)$ It is a sodium salt and is not soluble in water.
$(B)$ It is much sweeter than cane sugar.
$(C)$ It is of great value for diabetic patients and is excreted as such in urine.
$(D)$ It is harmful.

The given compound is used as:

Which of the following is not an antibiotic?

Two statements in respect of drug-enzyme interaction are given below.
Statement $I$: Action of an enzyme can be blocked only when an inhibitor blocks the active site of the enzyme.
Statement $II$: An inhibitor can form a strong covalent bond with the enzyme.
In the light of the above statements,choose the correct answer from the options given below.