Assertion `:` G-cells of gastric gland secrete castle's intrinsic factor.
Reason `:` This factor help in vitamin `B_(2)` absorption

Options

A. If both Assertion & Reason are True & the Reasonn is a correct explanation of the Assertion .
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

### Step-by-Step Solution:

1. **Understand the Assertion**: The assertion states that G-cells of the gastric gland secrete Castle's intrinsic factor.
- **Evaluation**: This statement is **false**. G-cells are responsible for secreting gastrin, not Castle's intrinsic factor.

2. **Understand the Reason**: The reason states that this factor helps in the absorption of vitamin B2.
- **Evaluation**: This statement is also **false**. Castle's intrinsic factor is crucial for the absorption of vitamin B12, not vitamin B2.

3. **Determine the Relationship**: Since both the assertion and the reason are false, we need to conclude whether the reason provides a correct explanation for the assertion.
- **Conclusion**: Since both statements are false, the reason does not explain the assertion.

4. **Select the Correct Option**: Based on the evaluations:
- Option A: Assertion true, Reason true (Incorrect)
- Option B: Assertion true, Reason false (Incorrect)
- Option C: Assertion false, Reason true (Incorrect)
- Option D: Assertion false, Reason false (Correct)

### Final Answer:
The correct option is **D**: Both the assertion and reason are false.

---