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Sulpha drugs are derivatives of which of the following?

1. Benzene sulphonic acid
2. Sulphanillic acid
3. Sulphanilamide
4. p - aminobenzoic acid

Correct answer: Sulphanilamide

Solution

All sulpha drugs (e.g., sulphadiazine, sulphapyridine) are structural derivatives of sulphanilamide (p-aminobenzenesulfonamide).

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