Raw meterials required for light reactions are

Options

A. ADP and `H_(2)O`
B. `ADP, H_(2)O` and `NADP`
C. `ADP` and `NADPH_(2)`
D. `ATP` and `NADP`.

Answer

### Step-by-Step Solution:

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants convert light energy into chemical energy, primarily in the form of glucose. It occurs in two main stages: the light reactions and the dark reactions (Calvin cycle).

2. **Identifying the Light Reactions**: The light reactions are the first stage of photosynthesis and occur in the thylakoid membranes of chloroplasts. These reactions require light to take place.

3. **Raw Materials for Light Reactions**: The raw materials required for the light reactions include:
- **Water (H2O)**: This is split during the light reactions to release oxygen and provide electrons.
- **NADP+**: This is a coenzyme that acts as an electron carrier. It is reduced to NADPH during the light reactions.
- **ADP**: Adenosine diphosphate is converted to ATP during the light reactions through the process of photophosphorylation.

4. **Products of Light Reactions**: The light reactions produce:
- **ATP (Adenosine Triphosphate)**: This energy carrier is used in the dark reactions.
- **NADPH**: This is also used in the dark reactions for the reduction of carbon compounds.

5. **Conclusion**: Therefore, the raw materials required for the light reactions are:
- Water (H2O)
- NADP+
- ADP

### Final Answer:
The raw materials required for the light reactions are **H2O, NADP+, and ADP**.

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