Assertion:- In pteridophyte well distinct alternation of generation is present.
Reason:- In pteridophytes both gametophyte and sporophyte are independent.

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 Solution:**

1. **Understanding the Assertion:**
- The assertion states that in pteridophytes, there is a well-distinct alternation of generations. This means that there are two distinct phases in their life cycle: the sporophyte phase and the gametophyte phase.

2. **Understanding the Reason:**
- The reason given is that in pteridophytes, both the gametophyte and sporophyte generations are independent. This means that both phases can live independently of each other and are not dependent on one another for survival.

3. **Explaining Alternation of Generations:**
- In pteridophytes, the life cycle follows a haplodiplontic pattern. This means that the sporophyte (diploid) phase alternates with the gametophyte (haploid) phase.
- The sporophyte undergoes meiosis to produce haploid spores. These spores germinate to form the gametophyte, which is also haploid.

4. **Identifying the Gametophyte:**
- The gametophyte in pteridophytes is known as the prothallus. This structure is independent and can photosynthesize, which allows it to survive without the sporophyte.

5. **Conclusion:**
- Since both the assertion and reason are correct, and the reason explains the assertion accurately, the final conclusion is that both the assertion and reason are true.

**Final Answer:**
Both the assertion and reason are correct, and the reason explains the assertion correctly.

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