A : In PPP (HMS), complete oxidation of one glucose molecule would produce `6CO_(2)` molecules and `12 NADPH_(2)` moleucles.
R : It occurs in cytoplasm and chloroplast, in presence of `O_(2)`.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the assertion and reason question regarding the Pentose Phosphate Pathway (PPP) and Hexose Monophosphate Pathway (HMP), we will analyze both statements step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that in the Pentose Phosphate Pathway (PPP) or Hexose Monophosphate Pathway (HMP), the complete oxidation of one glucose molecule produces 6 CO₂ molecules and 12 NADPH₂ molecules.
- The PPP is an alternative metabolic pathway to glycolysis that primarily functions to produce NADPH and ribose-5-phosphate.

2. **Evaluating the Assertion**:
- In the complete oxidation of one glucose molecule through the PPP, it is indeed true that 6 CO₂ molecules are produced.
- However, the production of NADPH is typically reported as 12 NADPH molecules, which is correct in the context of the PPP.
- Therefore, the assertion is **true**.

3. **Understanding the Reason (R)**:
- The reason states that the PPP occurs in the cytoplasm and chloroplast in the presence of O₂.
- The PPP does occur in the cytoplasm, and it can also occur in the chloroplasts of plant cells, which is true.
- However, the presence of O₂ is not a strict requirement for the PPP, as it can function under both aerobic and anaerobic conditions.

4. **Evaluating the Reason**:
- While the reason is true regarding the locations (cytoplasm and chloroplast), it inaccurately implies that O₂ is necessary for the PPP to occur, which is not correct.
- Therefore, the reason is **true**, but it does not correctly explain the assertion.

5. **Conclusion**:
- Since both the assertion and reason are true, but the reason does not correctly explain the assertion, the correct answer is that both statements are true, but the reason is not the correct explanation of the assertion.

### Final Answer:
The answer is **Option B**: Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

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