Consider the following statements regarding synthesis of starch and sucrose during daytime and select the correct ones.
(i) Triose phosphate is confined to chloroplast and is utilized for the synthesis of starch only.
(ii) Triose phosphate is translocated to cytosol from chloroplast.
(iii) Triose phosphate is utilized for the synthesis of both starch and sucrose.
(iv) Triose phosphate is translocated from cytosol to chloroplast.

Options

A. (a) i and iii
B. (b) ii and iii
C. (c) ii and iv
D. (d) iii and iv

Explanation

To analyze the statements regarding the synthesis of starch and sucrose during daytime, we will evaluate each statement one by one.

### Step-by-Step Solution:

1. **Evaluate Statement (i)**: "Triose phosphate is confined to chloroplast and is utilized for the synthesis of starch only."
- This statement is **incorrect**. Triose phosphate, specifically glyceraldehyde 3-phosphate (G3P), is not confined to the chloroplast. It is produced in the chloroplast during the Calvin cycle but is translocated to the cytosol where it can be used for the synthesis of both starch and sucrose, not just starch.

2. **Evaluate Statement (ii)**: "Triose phosphate is translocated to cytosol from chloroplast."
- This statement is **correct**. G3P is indeed translocated from the chloroplast to the cytosol, where it can be utilized for the synthesis of various carbohydrates including sucrose and starch.

3. **Evaluate Statement (iii)**: "Triose phosphate is utilized for the synthesis of both starch and sucrose."
- This statement is **correct**. G3P can be used in the cytosol to synthesize both starch and sucrose, as it is converted into fructose 1,6-bisphosphate, which is a precursor for both types of carbohydrates.

4. **Evaluate Statement (iv)**: "Triose phosphate is translocated from cytosol to chloroplast."
- This statement is **incorrect**. Triose phosphate is not translocated from the cytosol back to the chloroplast; rather, it is synthesized in the chloroplast and then sent to the cytosol.

### Conclusion:
Based on the evaluations:
- Statement (i) is incorrect.
- Statement (ii) is correct.
- Statement (iii) is correct.
- Statement (iv) is incorrect.

Thus, the correct statements are (ii) and (iii).

### Final Answer:
The correct answer is **Option B: Statements 2 and 3 are correct.**

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