Bacterial virus is called

Options

A. cyanophage
B. bacteriophage
C. mycophage
D. proteophage.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term used to describe a virus that infects bacteria.

2. **Identifying the Options**: The options given are:
- Sinophas
- Bacteriophage
- Mycophage
- Proteophas

3. **Analyzing Each Option**:
- **Sinophas**: This term refers to viruses that infect cyanobacteria, which are a type of bacteria but not all bacteria. Therefore, this option is incorrect.
- **Bacteriophage**: This term specifically refers to viruses that infect bacteria. This is the correct option.
- **Mycophage**: This term refers to viruses that infect mycobacteria, which are a specific type of bacteria. This option is not the general term for all bacteria.
- **Proteophas**: This term does not refer to viruses that infect bacteria, making it incorrect.

4. **Conclusion**: After analyzing the options, the correct answer is **Bacteriophage**, as it specifically denotes a virus that infects bacteria.

**Final Answer**: Bacterial virus is called **Bacteriophage**.

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