Assertion :- ln Angiosperms, sexual reproduction takes place through the flower.
Reason : All the parts of the flower are modification of stem

Options

A. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion
B. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
C. Assertion is true but the Reason is false
D. Both the statements are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that in angiosperms, sexual reproduction takes place through the flower. This is true as angiosperms, which are flowering plants, reproduce sexually via their flowers.

2. **Explaining the Process of Sexual Reproduction**: In angiosperms, sexual reproduction involves structures like stamens (male reproductive organs) and pistils (female reproductive organs). The process begins with pollination, where pollen from the anther (part of the stamen) is transferred to the stigma (part of the pistil).

3. **Details of Pollination**: Once the pollen lands on the stigma, it germinates and forms a pollen tube that grows down through the style to reach the ovary. This is where fertilization occurs, leading to the formation of seeds.

4. **Understanding the Reason**: The reason states that all parts of the flower are modifications of the stem. This statement is incorrect. While the flower does emerge from the stem, the parts of the flower (like sepals, petals, stamens, and carpels) are not merely modifications of the stem but are specialized structures for reproduction.

5. **Conclusion**: Therefore, the assertion is true, while the reason is false. The correct relationship is that the assertion stands alone as a true statement, and the reason does not support it.

### Final Answer:
- Assertion: True
- Reason: False