Opening of rectum in amphibians is termed as

Options

A. Cochlea
B. Cloaca
C. Coccyx
D. None of these

Answer

To solve the question "Opening of rectum in amphibians is termed as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term used to describe the opening of the rectum specifically in amphibians.

2. **Identifying Key Terms**: The key term here is "opening of the rectum" and the context is "amphibians."

3. **Reviewing Options**: The options provided are:
- A. Cochlea
- B. Cloaca
- C. Coccy
- D. None of these

4. **Analyzing Each Option**:
- **A. Cochlea**: This is a part of the inner ear and is not related to the digestive system.
- **B. Cloaca**: This is a common opening for the excretory, reproductive, and digestive tracts in many animals, including amphibians. It serves as the opening for the rectum.
- **C. Coccy**: This refers to the coccyx or tailbone in humans and is not related to the rectum in amphibians.
- **D. None of these**: This option would only be correct if none of the other options were applicable.

5. **Conclusion**: Based on the analysis, the correct term for the opening of the rectum in amphibians is "Cloaca."

### Final Answer:
The opening of the rectum in amphibians is termed as **B. Cloaca**.