Question

Sulfa drugs are derivatives of:

• A. benzoic acid
• B. sulphanilic acid
• C. sulphanilamide
• D. p-aminobenzoic acid

Hint:

Sulfa drugs are derived from sulphanilic acid, which contains the sulfonamide group.

Answer 1

The Correct Option is B

Step 1: Understanding sulfa drugs.
Sulfa drugs are a group of synthetic drugs that contain the sulfonamide group, derived from sulphanilic acid. These drugs are primarily used as antibiotics.

Step 2: Explanation of options.
- (B) Sulphanilic acid is the correct precursor for sulfa drugs. - (A) Benzoic acid is not the direct precursor for sulfa drugs. - (C) Sulphanilamide is a product of sulphanilic acid, not the precursor. - (D) p-Aminobenzoic acid is not the direct precursor for sulfa drugs.

Final Answer: \[ \boxed{\text{B) sulphanilic acid}} \]