Which of the following is a bactericidal antibiotic?

Options

A. Ofloxacin
B. Tetracycline
C. ChloramphenicoL
D. Erythromycin

Explanation

To determine which of the given options is a bactericidal antibiotic, we can follow these steps:

### Step 1: Understand the Definitions
- **Bactericidal Antibiotics**: These antibiotics kill bacteria directly.
- **Bacteriostatic Antibiotics**: These antibiotics inhibit the growth and reproduction of bacteria but do not kill them.

### Step 2: Analyze the Options
We have four options to analyze:
1. **Ophloxacin**
2. **Tetracycline**
3. **Chloramphenicol**
4. **Erythromycin**

### Step 3: Classify Each Antibiotic
- **Ophloxacin**: This is a fluoroquinolone antibiotic that is known to be bactericidal. It works by inhibiting bacterial DNA gyrase and topoisomerase IV, leading to cell death.

- **Tetracycline**: This antibiotic is classified as bacteriostatic. It inhibits protein synthesis in bacteria, preventing their growth.

- **Chloramphenicol**: This antibiotic is also bacteriostatic. It inhibits protein synthesis by binding to the 50S subunit of the bacterial ribosome.

- **Erythromycin**: This antibiotic is primarily bacteriostatic as well, as it inhibits protein synthesis by binding to the 50S ribosomal subunit.

### Step 4: Identify the Bactericidal Antibiotic
From the analysis, the only antibiotic that is classified as bactericidal is **Ophloxacin**.

### Final Answer
The bactericidal antibiotic among the options provided is **Ophloxacin**.

---