This section contains Assertion (A) and Reason (R ) type questions. Each questions has (1), (2), (3), and (4) out of which only one is correct.
Assertion (A) Female gametophyte in angiosperm is 8 nucleate and 7 celled.
Reason (R ) Double fertilisation occurs in angiosperms.

Options

A. Both Assertion and Reason are correct, and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
C. Assertion is correct, but Reason is incorrect
D. Assertion is incorrect, but Reason is correct

Answer

To solve the Assertion (A) and Reason (R) type question regarding angiosperms, we will analyze both statements and determine their correctness and relationship.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that the female gametophyte in angiosperms is 8 nucleate and 7 celled.
- In angiosperms, the female gametophyte is known as the embryo sac.
- The structure of the embryo sac consists of:
- 3 antipodal cells (located at the chalazal end).
- 2 synergid cells and 1 egg cell (located at the micropylar end).
- Additionally, there are 2 polar nuclei in the central cell.
- This results in a total of 7 cells (3 antipodal + 2 synergids + 1 egg + 1 central cell) and 8 nuclei (3 + 3 + 2).
- Therefore, the assertion is **correct**.

2. **Understanding the Reason (R)**:
- The reason states that double fertilization occurs in angiosperms.
- Double fertilization is a unique process in angiosperms where:
- One male gamete fuses with the egg cell to form the zygote.
- The second male gamete fuses with the two polar nuclei in the central cell to form the triploid endosperm.
- This characteristic is indeed true for angiosperms, making the reason **correct**.

3. **Analyzing the Relationship**:
- While both the assertion and reason are correct, the reason does not explain why the female gametophyte is 8 nucleate and 7 celled.
- The assertion describes the structure of the female gametophyte, while the reason describes a process (double fertilization) that occurs in angiosperms.
- Therefore, the correct conclusion is that both statements are true, but the reason does not justify the assertion.

4. **Choosing the Correct Option**:
- Based on the analysis, the correct option is that both the assertion and reason are correct, but the reason does not explain the assertion.

### Final Answer:
The correct option is (2): Both A and R are correct, but R does not explain A.