Which of the following contain a nitro group ?

Options

A. martitius yellow
B. chloromphinical
C. benzylpinicillin
D. sulphapyridine

Answer

To determine which of the given compounds contains a nitro group (–NO2), we will analyze the structures of each compound listed in the options.

### Step-by-Step Solution:

1. **Identify the Compounds**: We have four compounds to analyze:
- A) Martitius-Alu
- B) Chloramphenicol
- C) Benzylpenicillin
- D) Sulfapyridine

2. **Analyze Martitius-Alu**:
- Draw the structure of Martitius-Alu.
- Look for the presence of a nitro group (–NO2).
- The structure contains a benzene ring with a –NO2 group attached.
- **Conclusion**: Martitius-Alu contains a nitro group.

3. **Analyze Chloramphenicol**:
- Draw the structure of Chloramphenicol.
- Check for the presence of a nitro group (–NO2).
- The structure also contains a –NO2 group attached to the benzene ring.
- **Conclusion**: Chloramphenicol contains a nitro group.

4. **Analyze Benzylpenicillin**:
- Draw the structure of Benzylpenicillin.
- Look for the presence of a nitro group (–NO2).
- The structure does not show any –NO2 group; it contains other functional groups but not a nitro group.
- **Conclusion**: Benzylpenicillin does not contain a nitro group.

5. **Analyze Sulfapyridine**:
- Draw the structure of Sulfapyridine.
- Check for the presence of a nitro group (–NO2).
- The structure does not show any –NO2 group; it has other nitrogen-containing groups but not a nitro group.
- **Conclusion**: Sulfapyridine does not contain a nitro group.

### Final Answer:
The compounds that contain a nitro group are:
- **A) Martitius-Alu**
- **B) Chloramphenicol**