With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ?

Options

A. Light saturation for `CO_(2)` fixation occurs at 10% of full sunlight .
B. Increasing atmospheric `CO_(2)` concentration up to 0.05% can enhance `CO_(2)` fixation rate
C. `C_(3)` plants respond to higher temperatures with enhanced photosynthesis while `C_(4)` plants have much lower temperature optimum.
D. Tomato is a greenhouse crop which can be grown in `CO_(2)` enriched atmosphere for higher yield.

Explanation

To determine which statement is not correct regarding the factors affecting the rate of photosynthesis, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement Analysis**:
- **Statement 1**: "Light saturation for CO2 fixation occurs at 10% of full sunlight."
- This statement is correct. Photosynthesis can reach a saturation point where increasing light intensity does not further increase the rate of CO2 fixation. This saturation can occur at around 10% of full sunlight for many plants.

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