Fill in the blanks
Light saturation ocuurs at ….a…per cent of full sunlight.
2. There is a….b…. Relationship between incident light and `CO_(2)` fixation rates at low light intensities.
3. `C_(3)` plants show saturation at about …c…`mulL^(-1)` while `C_(4)` corresponds to saturation at about ....d....`mulL^(-1)`

Options

A. a-2-5%, b-sigmoid, c- 350, d-460
B. a-50%, b-linear, c-460, d- 350
C. a-10%, b-sigmoid, c- 360, d-450
D. a-10%, b-linear, c-450, d- 360

Explanation

### Step-by-Step Solution:

1. **Light Saturation Percentage**:
- Light saturation occurs at **10%** of full sunlight. This means that at this level of light intensity, the rate of photosynthesis reaches its maximum and does not increase with further increases in light intensity.
- **Fill in the blank**: a) **10**

2. **Relationship Between Incident Light and CO2 Fixation**:
- There is a **linear** relationship between incident light and CO2 fixation rates at low light intensities. This indicates that as the light intensity increases, the rate of CO2 fixation also increases proportionally until it reaches a certain point.
- **Fill in the blank**: b) **linear**

3. **Saturation Levels for C3 and C4 Plants**:
- C3 plants show saturation at about **450** µL/L of CO2. This means that at this concentration, the photosynthetic rate of C3 plants reaches its maximum.
- C4 plants correspond to saturation at about **360** µL/L of CO2. This indicates that C4 plants can achieve their maximum photosynthetic rate at a lower concentration of CO2 compared to C3 plants.
- **Fill in the blanks**: c) **450**, d) **360**

### Final Answers:
1. a) **10**
2. b) **linear**
3. c) **450**, d) **360**