Which of the following statements is incorrect

Options

A. Stroma lamellae have PS I only and lack NADP reductase
B. Grana lamellae have both PS I and PS II
C. Cyclic photophosphorylation involves both PS I and PS II
D. Both ATP and NADPH + `H^+` are synthesized during non-cyclic photophosphorylation

Explanation

To determine which of the statements regarding photosynthesis is incorrect, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement Analysis**:
- **Statement 1**: "Stromal lamellae have PS1 only and lack NADP reductase."
- **Analysis**: This statement is correct. The stromal lamellae are associated with Photosystem I (PS1) and do not contain NADP reductase.

2. **Statement 2**: "Granum lamellae have both Photosystem I and Photosystem II."
- **Analysis**: This statement is also correct. Granum lamellae contain both PS1 and PS2, which are essential for the light-dependent reactions of photosynthesis.

3. **Statement 3**: "Cyclic photophosphorylation involves both Photosystem I and Photosystem II."
- **Analysis**: This statement is incorrect. Cyclic photophosphorylation only involves Photosystem I (PS1) and does not involve Photosystem II (PS2). This is the statement we are looking for as it is incorrect.

4. **Statement 4**: "Both ATP and NADPH are synthesized during non-cyclic photophosphorylation."
- **Analysis**: This statement is correct. Non-cyclic photophosphorylation produces both ATP and NADPH, which are used in the Calvin cycle.

### Conclusion:
The incorrect statement is **Statement 3**: "Cyclic photophosphorylation involves both Photosystem I and Photosystem II." Therefore, the answer is **option C**.

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