Sulpha drugs are derivatives of

Options

A. Benzenesulphonic acid
B. Sulphanilic acid
C. Sulfonamide
D. p-aminobenzoic acid

Answer

### Step-by-Step Solution:

1. **Identify the Class of Drugs**: Sulpha drugs, also known as sulfonamides, are a class of synthetic antimicrobial agents.

2. **Understand the Derivatives**: Sulpha drugs are derivatives of sulphonamide. They are chemically related to compounds that contain a sulfonamide group, which is characterized by the presence of a sulfonyl (SO2) group attached to a nitrogen atom.

3. **List Related Compounds**: In addition to sulphonamide, sulpha drugs can also be derived from other compounds such as:
- Benzene sulfonate
- Sulfanilic sulfonamide
- Para-amino benzoic acid (PABA)

4. **Recognize Their Function**: Sulpha drugs exhibit excellent antimicrobial activity, meaning they are effective against infections caused by various microorganisms.

5. **Examine the Structure**: The structure of sulfonamides typically includes:
- A benzene ring
- A sulfonyl group (S=O)
- An amino group (NH2) attached to the benzene ring.

6. **Conclude the Answer**: Therefore, the correct answer to the question is that sulpha drugs are derivatives of sulphonamide.

### Final Answer:
Sulpha drugs are derivatives of sulphonamide.

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