Find out the incorrect statement from the following .

Options

A. Dark reaction depends on the product formed by light reaction.
B. In the stroma , enzymatic reactions incorporate `CO_2` into the plant leading to the synthesis of sugar.
C. Purple and green sulphur bacteria use `H_2S` as hydrogen donor.
D. There is no division of lobour in chloroplast, dark and light reaction occurs in same compartment.

Answer

To solve the question of identifying the incorrect statement, we will analyze each statement provided in the options step by step.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- **Statement:** "Dark reaction depends on the product formed by the light reaction."
- **Explanation:** The dark reaction (Calvin cycle) indeed relies on the products of the light reaction (ATP and NADPH) to synthesize glucose. Therefore, this statement is correct.

2. **Analyze the Second Statement:**
- **Statement:** "In stroma, enzymatic reaction incorporates carbon dioxide into the plant leading to the synthesis of sugar."
- **Explanation:** This statement is accurate as the stroma of chloroplasts is where the Calvin cycle occurs, incorporating CO2 and leading to sugar synthesis. Thus, this statement is also correct.

3. **Analyze the Third Statement:**
- **Statement:** "Purple and green sulphur bacteria use H2S as the hydrogen donor."
- **Explanation:** This statement is true. Purple and green sulfur bacteria utilize hydrogen sulfide (H2S) as an electron donor during photosynthesis. Therefore, this statement is correct as well.

4. **Analyze the Fourth Statement:**
- **Statement:** "There is no division of labor in the chloroplast. Dark light reaction occurs in the same compartment."
- **Explanation:** This statement is incorrect. In chloroplasts, the light reactions occur in the thylakoid membranes, while the dark reactions (Calvin cycle) occur in the stroma. Hence, there is a division of labor in chloroplasts, making this statement incorrect.

### Conclusion:
The incorrect statement is: "There is no division of labor in the chloroplast. Dark light reaction occurs in the same compartment."