A: Growth of male gametophyle is completed over the female reprofuctive organ
R: 2- celled stage of partial male gametophyte is developed in situ

Options

A. if both assetion A reason are ture and the reason is the correct explanation of the assertion then mark
B. if both assertion & reason are ture and the reason is not the correct explanation of the assertin then mark
C. if assertion is true statement but reason is false then mark
D. if both assertion and reason are flase statements then mark

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "the growth of male gametophyte is completed over the female reproductive organ." In flowering plants, the male gametophyte (pollen grain) develops in the anther and is transferred to the stigma of the female reproductive organ (pistil) during pollination. The assertion implies that the growth of the male gametophyte occurs on the female reproductive organ, which is misleading.

**Hint**: Consider where the male gametophyte develops and how it interacts with the female reproductive structures.

2. **Understanding the Reason**: The reason states that "the two-celled stage of partial male gametophyte is developed in situ." In angiosperms, pollen grains are typically released in a two-celled stage (containing the generative cell and the tube cell). This development occurs naturally (in situ) within the anther before the pollen is released.

**Hint**: Think about the stages of pollen development and where they occur in the plant lifecycle.

3. **Evaluating the Truth of the Statements**:
- The assertion is **false** because it incorrectly states that the growth of the male gametophyte is completed on the female reproductive organ.
- The reason is **true** because it accurately describes the development of the male gametophyte in angiosperms.

**Hint**: Assess each statement independently to determine if they are true or false based on your knowledge of plant reproduction.

4. **Conclusion**: Since the assertion is false and the reason is true, the correct conclusion is that the assertion does not correctly explain the reason. Therefore, the answer is that the assertion is false, and the reason is true.

**Hint**: Remember to differentiate between the assertion and reason when determining their relationship.

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