The nerve ring of Pheritima is located in segments 

Options

A. 2, 3
B. 3,4
C. 4, 5
D. 5, 6

Answer

To determine the location of the nerve ring in Pheritima, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Pheritima**: Pheritima, commonly known as earthworm, has a segmented body consisting of approximately 100 to 120 segments.

2. **Identify the Nerve Ring**: The nerve ring, also referred to as the null ring, is an important structure in the nervous system of Pheritima. It is an oblique ring that encircles the pharynx.

3. **Locate the Segments**: The segments of Pheritima are numbered sequentially. The nerve ring is specifically located in segments that are adjacent to the pharynx.

4. **Determine the Specific Segments**: Upon examining the anatomy of Pheritima, it is established that the nerve ring is located in segments 3 and 4.

5. **Select the Correct Option**: Based on the information gathered, the correct answer to the question is that the nerve ring of Pheritima is located in segments 3 and 4.

### Final Answer:
The nerve ring of Pheritima is located in segments **3 and 4**.

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