Which of the following statement is incorrect ?

Options

A. Humans have 37 pairs of spinal nerves
B. 10 pairs of cranial nerves are present ni anamniotes
C. Afferent nerves carry impulses from muscles and glands to brain.
D. Twelve pairs of cranial nerves are present in reptiles , birds and mammals.

Answer

To determine which statement is incorrect, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Evaluate the First Statement:**
- The first statement claims that "humans have 37 pairs of spinal nerves."
- This statement is incorrect. In reality, humans have **31 pairs of spinal nerves**.
- Breakdown:
- 8 cervical pairs
- 12 thoracic pairs
- 5 lumbar pairs
- 5 sacral pairs
- 1 coccygeal pair

2. **Evaluate the Second Statement:**
- The second statement asserts that "10 pairs of cranial nerves are present in anamniotes."
- This statement is correct. Anamniotes, which include fish and amphibians, do indeed have **10 pairs of cranial nerves**.

3. **Evaluate the Third Statement:**
- The third statement says that "afferent nerves carry impulses from muscles and glands to the brain."
- This statement is also correct. Afferent nerves (or sensory nerves) carry sensory information from the body (including muscles and glands) to the central nervous system (CNS), which includes the brain.

4. **Evaluate the Fourth Statement:**
- The fourth statement claims that "12 pairs of cranial nerves are present in reptiles, birds, and mammals."
- This statement is correct. Reptiles, birds, and mammals have **12 pairs of cranial nerves**.

### Conclusion:
After evaluating all the statements, the incorrect statement is the **first statement**, which claims that humans have 37 pairs of spinal nerves. The correct number is 31 pairs.

### Final Answer:
The incorrect statement is: **"Humans have 37 pairs of spinal nerves."**

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