Read the following statements and selct the correct ones.
(i) PS I is involved in non-cyclic photophosphroylation only.
(ii) PS II is involved in both cyclic and non-cyclic photophosphorylation.
(iii) Stoma lamellae membranes possess PS I only whereas grana lamellae membranes possess both PS I and PS II.

Options

A. i only
B. ii only
C. iii only
D. i,ii and iii

Explanation

To determine the correctness of the statements regarding photosystems in higher plants, let's analyze each statement step by step.

### Step 1: Analyze Statement (i)
**Statement:** PS I is involved in non-cyclic photophosphorylation only.

**Analysis:**
- PS I (Photosystem I) is involved in both cyclic and non-cyclic photophosphorylation.
- It is not limited to just non-cyclic photophosphorylation. Therefore, this statement is **incorrect**.

### Step 2: Analyze Statement (ii)
**Statement:** PS II is involved in both cyclic and non-cyclic photophosphorylation.

**Analysis:**
- PS II (Photosystem II) is primarily involved in non-cyclic photophosphorylation.
- While it plays a role in the overall process of photosynthesis, it does not participate in cyclic photophosphorylation. Thus, this statement is also **incorrect**.

### Step 3: Analyze Statement (iii)
**Statement:** Stroma lamellae membranes possess PS I only whereas grana lamellae membranes possess both PS I and PS II.

**Analysis:**
- The stroma lamellae contain only PS I, which is involved in cyclic photophosphorylation.
- The grana lamellae contain both PS I and PS II, which are involved in non-cyclic photophosphorylation. Therefore, this statement is **correct**.

### Conclusion
From the analysis:
- Statement (i) is incorrect.
- Statement (ii) is incorrect.
- Statement (iii) is correct.

Thus, the only correct statement is **(iii)**.

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