A: Initial growth of pollen tube takes places on expenditure of food present in the stigma and style
R:Pollen tube travels intracellularity and chemoitactically

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

To analyze the given assertion and reason regarding the growth of the pollen tube, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that the initial growth of the pollen tube takes place on the expenditure of food present in the stigma and style.
- **Evaluation**: The stigma and style do not serve as a source of food reserves for the pollen tube. Instead, the pollen tube primarily utilizes nutrients from the pollen grain itself for its initial growth.

2. **Understanding the Reason**:
- The reason states that the pollen tube travels intracellularly and chemotactically.
- **Evaluation**: The pollen tube grows through the style towards the ovary in a tube-like structure, not intracellularly. It does respond to chemical signals (chemotaxis), but the description of "intracellularly" is misleading.

3. **Conclusion on Assertion and Reason**:
- Since the assertion is incorrect (the stigma and style do not provide food for the pollen tube) and the reason is also incorrect (the pollen tube does not travel intracellularly), we conclude that both statements are false.

4. **Final Answer**:
- Therefore, the correct option is that both the assertion and the reason are false.