Assertion:Claspers are a distinguishing feature of males in Class Chondricthyes.
Reason: Claspers help in copulation.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Analyze the Assertion
The assertion states that "Claspers are a distinguishing feature of males in Class Chondrichthyes."
- In Class Chondrichthyes, which includes sharks and rays, males possess a unique structure called claspers.
- Claspers are elongated, rod-like structures that are found on the pelvic fins of male Chondrichthyes and are not present in females.
- Therefore, the assertion is **true**.

### Step 2: Analyze the Reason
The reason states that "Claspers help in copulation."
- Claspers play a vital role during mating in Chondrichthyes.
- They are used by males to grasp the female during copulation, allowing for successful mating.
- Hence, this reason is also **true**.

### Step 3: Determine the Relationship Between Assertion and Reason
Now we need to determine if the reason correctly explains the assertion.
- While both statements are true, the reason does not directly explain why claspers are a distinguishing feature of males.
- The assertion focuses on the presence of claspers as a distinguishing characteristic, while the reason explains their function in reproduction.

### Conclusion
Both the assertion and the reason are true, but the reason is not the correct explanation of the assertion. Therefore, the correct answer is that both assertion and reason are true, but the reason does not explain the assertion.

### Final Answer
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.