Assertion: Algae shown only anisogamous type of reproduction.
Reason: In algae, gametes can never be non flagellated.

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 evaluate both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Algae show only anisogamous type of reproduction."
- Anisogamy refers to a type of sexual reproduction involving gametes that are of different sizes and shapes.

2. **Evaluating the Assertion**:
- Algae can reproduce in three ways: vegetative, asexual, and sexual.
- In sexual reproduction, algae can exhibit isogamous (same size and shape gametes), anisogamous (different size and shape gametes), and oogamous (large non-motile female gamete and small motile male gamete) types of reproduction.
- Therefore, the assertion is **false** because algae do not show only anisogamous reproduction.

3. **Understanding the Reason**:
- The reason states that "In algae, gametes can never be non-flagellated."
- This implies that all gametes produced by algae are motile (flagellated).

4. **Evaluating the Reason**:
- In algae, while many gametes are flagellated, some gametes can indeed be non-flagellated, especially in isogamous and oogamous types of reproduction.
- Thus, the reason is also **false**.

5. **Conclusion**:
- Since both the assertion and the reason are false, the correct answer is that both the assertion and the reason are false.

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

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