Assertion :- Pineal gland found on the epithalamus of Diencephalon.
Reason:- It is a type of exocrine gland which is active in later age of life.

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.

Answer

### Step-by-Step Text Solution:

1. **Understanding the Assertion**:
- The assertion states that the pineal gland is found on the epithalamus of the diencephalon.
- This is correct. The pineal gland is indeed located in the epithalamus, which is part of the diencephalon in the brain.

2. **Understanding the Reason**:
- The reason provided claims that the pineal gland is a type of exocrine gland that is active in later life.
- This statement is incorrect. The pineal gland is classified as an endocrine gland, not an exocrine gland. Endocrine glands secrete hormones directly into the bloodstream, whereas exocrine glands secrete substances through ducts.

3. **Function of the Pineal Gland**:
- The primary hormone produced by the pineal gland is melatonin, which is involved in regulating sleep-wake cycles and circadian rhythms.
- Melatonin plays a role in various physiological functions, including metabolism, pigmentation, and the menstrual cycle.

4. **Conclusion**:
- Since the assertion is true and the reason is false, the correct answer is that the assertion is true, but the reason is false.

### Final Answer:
- The correct option is: Assertion is true, but the reason is false.

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