Assertion : Plant movements induced by external stimuli are known as autonomic movements.
Reason: Seismonastic movements are shown by crows.

Options

A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
B. If both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
C. If Assertion is true but the Reason is false.
D. If both Assertion and Reason are false.

Answer

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Plant movements induced by external stimuli are known as autonomic movements."
- This statement is incorrect. The correct term for plant movements induced by external stimuli is "paratonic movements" or "induced movements." Autonomic movements are those that occur without external stimuli.

2. **Understanding the Reason**:
- The reason states that "Seismonastic movements are shown by crows."
- This statement is also incorrect. Seismonastic movements are exhibited by certain plants, such as the Mimosa pudica (commonly known as the touch-me-not plant), not by animals like crows.

3. **Evaluating the Relationship**:
- Since both the assertion and the reason are false, we conclude that neither statement is correct.

4. **Choosing the Correct Option**:
- Based on our analysis, the correct option is that both the assertion and the reason are false.

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