Assertion :- Pollen grains can withstand high temperature and strong acids and alkali.
Reason-Their inner layer intine is made up of sporopollenin

Options

A. A: if assertion and reason are true and reason is correct explanation of assertion.
B. B: if assertion and reason are true but reason is not the correct explanation of assertion.
C. C: if assertion is true and reason is false.
D. D: both are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that "Pollen grains can withstand high temperature and strong acids and alkali."
- This statement is true because pollen grains are known for their resilience to extreme conditions.

2. **Understanding the Reason:**
- The reason provided is "Their inner layer intine is made up of sporopollenin."
- This statement is false because the intine (the inner layer of the pollen grain) is primarily composed of cellulose and pectin, not sporopollenin.

3. **Analyzing the Relationship:**
- The assertion is true, while the reason is false.
- The reason does not correctly explain the assertion since the protective properties of pollen grains are due to the outer layer called exine, which is made of sporopollenin.

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

**Final Answer:**
- The assertion is true, and the reason is false.

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