Assertion :- Epidermal stem hairs are usually of multicellular in nature.
Reason:- They are of absorptive nature.

Options

A. If both Assertion & Reason are True & Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but the Reason is a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

### Step-by-Step Text Solution:

1. **Understanding the Assertion**:
- The assertion states that "Epidermal stem hairs are usually multicellular in nature."
- This is true because epidermal hairs, also known as trichomes, are often composed of multiple cells.

2. **Understanding the Reason**:
- The reason states that "They are of absorptive nature."
- This statement is false. Epidermal stem hairs (trichomes) do not primarily function in absorption; their main role is related to transpiration and protection.

3. **Evaluating the Relationship**:
- Since the assertion is true and the reason is false, we need to identify the correct option based on this relationship.

4. **Identifying the Correct Option**:
- Option A states both assertion and reason are true. This is incorrect because the reason is false.
- Option B states both assertion and reason are true. This is also incorrect for the same reason.
- Option C states that the assertion is true but the reason is false. This is correct.
- Option D states both assertion and reason are false. This is incorrect because the assertion is true.

5. **Conclusion**:
- The correct answer is Option C: "Assertion is true but the reason is false."