Which one of the following is an antacid .

Options

A. Iproniazid
B. Salvarsan
C. Zantac
D. chloramphenicol.

Answer

To determine which of the given options is an antacid, we need to analyze each option based on their functions and classifications.

### Step-by-Step Solution:

1. **Understanding Antacids**:
- Antacids are basic compounds that help neutralize stomach acid. They are used to relieve symptoms of heartburn, indigestion, and upset stomach by increasing the pH level in the stomach.

2. **Analyzing the Options**:
- **A. Ipranazide**: This is an antidepressant medication that acts on the central nervous system. It is not used for neutralizing stomach acid, so it is not an antacid.
- **B. Sulversin**: This is an antimicrobial drug used to treat infections caused by microbes. It does not have properties that neutralize stomach acid, hence it is not an antacid.
- **C. Zantac (Ranitidine)**: This medication is known to reduce the production of stomach acid and is used to treat ulcers and gastroesophageal reflux disease (GERD). It functions as an antacid by decreasing acid levels in the stomach.
- **D. Chloramphenicol**: This is a broad-spectrum antibiotic used to treat bacterial infections. It does not have any antacid properties.

3. **Conclusion**:
- Among the options provided, **C. Zantac (Ranitidine)** is the only medication that functions as an antacid.

### Final Answer:
The correct answer is **C. Zantac (Ranitidine)**.