A pair of intestinal caecae in the alimentary canal of earthworm arise from

Options

A. a) 16th segment
B. b) 26th segment
C. c) 36th segment
D. d) 6th segment

Explanation

To solve the question regarding the origin of the pair of intestinal caeca in the alimentary canal of the earthworm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure**:
- The intestinal caeca are projections in the alimentary canal of the earthworm that contain digestive glands.

2. **Function of Intestinal Caeca**:
- These projections play a crucial role in digestion by secreting various digestive enzymes that aid in breaking down food.

3. **Identify the Segment**:
- The question specifically asks from which segment of the earthworm the intestinal caeca arise.

4. **Locate the Segment**:
- It is known that the intestinal caeca arise from the 26th segment of the earthworm.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the pair of intestinal caeca in the alimentary canal of the earthworm arises from the 26th segment.

### Final Answer:
**Option B - 26 segment**

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