[A] : Kreb s cycle is considered as amphibolic pathway.
[R]: Catabolic pathways converge on it and anabolic pathways diverge from it choose the correct statement.

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

To solve the question regarding the Kreb's cycle being considered an amphibolic pathway, we will analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "Kreb's cycle is considered an amphibolic pathway."
- The Kreb's cycle, also known as the citric acid cycle, is indeed classified as an amphibolic pathway. This means it plays a role in both catabolic (breaking down molecules) and anabolic (building up molecules) processes.

2. **Understanding the Reason (R)**:
- The reason states that "Catabolic pathways converge on it and anabolic pathways diverge from it."
- This statement is accurate. In cellular metabolism, catabolic pathways (which break down nutrients to produce energy) feed into the Kreb's cycle, while anabolic pathways (which build complex molecules) use intermediates from the Kreb's cycle to synthesize larger molecules.

3. **Evaluating the Relationship**:
- Since both the assertion and the reason are true, we need to determine if the reason correctly explains the assertion.
- The reason does explain why the Kreb's cycle is considered an amphibolic pathway: it serves as a junction for catabolic pathways to enter and for anabolic pathways to derive from.

4. **Conclusion**:
- Therefore, both the assertion and reason are true, and the reason is the correct explanation for the assertion.

### Final Answer:
The correct statement is: **Both assertion and reason are true, and the reason is the correct explanation for the assertion.**