Assertion : Amphibians are warm blooded animals.
Reason : Amphibians never undergo summer sleep.

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

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Amphibians are warm-blooded animals." This needs to be evaluated for its truthfulness.

2. **Evaluating the Assertion**: Amphibians, such as frogs and salamanders, are actually cold-blooded (ectothermic) animals. This means their body temperature is not regulated internally and can fluctuate with the environment. Therefore, the assertion is **false**.

3. **Understanding the Reason**: The reason states that "Amphibians never undergo summer sleep." This also needs to be evaluated.

4. **Evaluating the Reason**: Amphibians do undergo a form of dormancy during extreme temperatures. In summer, they may enter a state called aestivation (summer sleep) to survive high temperatures and lack of water. Therefore, the reason is also **false**.

5. **Conclusion**: Since both the assertion and the reason are false, the correct conclusion is that both statements are incorrect.

### Final Answer:
Both the assertion and the reason are false.