Which of the following is not required for photosynthesis by the green leaves of a plant ?

Options

A. carbon dioxide
B. oxygen
C. sunlight
D. water

Answer

To determine which of the following is not required for photosynthesis by the green leaves of a plant, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Photosynthesis**:
- Photosynthesis is the process by which green plants make their own food using sunlight, carbon dioxide, and water.

2. **Identify the Components Required for Photosynthesis**:
- The essential components for photosynthesis are:
- **Carbon Dioxide (CO2)**: This gas is absorbed from the atmosphere.
- **Water (H2O)**: This is absorbed from the soil.
- **Sunlight**: This provides the energy needed for the process.

3. **Recognize the By-Products of Photosynthesis**:
- During photosynthesis, the plant produces:
- **Oxygen (O2)**: This is released as a by-product into the atmosphere.
- **Glucose (a form of carbohydrate)**: This is the food produced by the plant.

4. **Analyze the Options Given**:
- The options provided are Carbon Dioxide, Oxygen, Sunlight, and Water.
- From our understanding, we know that:
- Carbon Dioxide is required.
- Water is required.
- Sunlight is required.
- Oxygen is produced, not required for the process.

5. **Conclusion**:
- Therefore, the component that is **not required** for photosynthesis is **Oxygen**.

### Final Answer:
**Oxygen** is not required for photosynthesis by the green leaves of a plant.

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