Who wrote the memoir on Pheretima and described its anatomy?

Options

A. M.L. Bhatia
B. B.I. Sunderraj
C. K.N. Bahl
D. Beni Prasad

Answer

To answer the question "Who wrote the memoir on Pheretima and described its anatomy?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Subject**: The question is about a memoir on Pheretima, which is a genus of earthworms.

2. **Recall Key Information**: The memoir specifically discusses the anatomy of Pheretima. This genus is important in biological studies, particularly in the context of earthworm anatomy.

3. **Review the Options**: The options provided are:
- M. L. Bhatia
- B. I. Sundararaj
- K. N. Bahal
- Bani Prasad

4. **Determine the Correct Answer**: According to the information provided in the video transcript, K. N. Bahal is the correct answer. He published a memoir on Indian earthworms, specifically on Pheretima, in 1926.

5. **Additional Context**: K. N. Bahal was recognized for his work and received the Joy Govind Law Memorial Gold Medal in 1942 for his contributions to the study of earthworms.

6. **Final Answer**: The correct answer to the question is **K. N. Bahal**.