The antibiotics used against typhoid , pneumonia and brochitis etc. is

Options

A. Penicillin
B. Tetracyline
C. Ofloxacin
D. Chloramphenicol

Answer

To answer the question regarding the antibiotics used against typhoid, pneumonia, and bronchitis, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Antibiotics**:
- Antibiotics are medications that fight bacterial infections. They are used to treat various diseases caused by bacteria.

2. **Identifying the Diseases**:
- The diseases mentioned in the question are typhoid, pneumonia, and bronchitis. Each of these diseases is caused by bacterial infections.

3. **Analyzing the Options**:
- The options given are penicillin, tretinoin, ofloxacin, and chloramphenicol. We need to evaluate which of these antibiotics is effective against the diseases listed.

4. **Evaluating Each Antibiotic**:
- **Penicillin**: Effective against some bacterial infections but not specifically against typhoid or bronchitis.
- **Tretinoin**: This is not an antibiotic; it is primarily used for skin conditions and does not treat the diseases mentioned.
- **Ofloxacin**: An antibiotic used for bacterial infections, including pneumonia, but not specifically indicated for typhoid or bronchitis.
- **Chloramphenicol**: This antibiotic is effective against a wide range of bacterial infections, including typhoid, pneumonia, and bronchitis.

5. **Conclusion**:
- Based on the evaluation, chloramphenicol is the antibiotic that is used against typhoid, pneumonia, and bronchitis. Therefore, the correct answer is **chloramphenicol**.

### Final Answer:
The antibiotics used against typhoid, pneumonia, and bronchitis is **chloramphenicol**.

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