The source of oxygen evolved during photosynthesis is

Options

A. `H_(2)O`
B. `C_(6)H_(12)O_(6)`
C. `CO_(2)`
D. `n(CH_(2)O)`

Answer

To answer the question "The source of oxygen evolved during photosynthesis is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Process of Photosynthesis**:
- Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy, using carbon dioxide and water.

2. **Identify the Inputs of Photosynthesis**:
- The main inputs for photosynthesis are carbon dioxide (CO2) and water (H2O).

3. **Recognize the Role of Water**:
- During photosynthesis, specifically in the light-dependent reactions, water molecules are split through a process known as photolysis.

4. **Determine the Byproducts**:
- The splitting of water releases oxygen (O2) as a byproduct. This is the oxygen that is evolved and released into the atmosphere.

5. **Evaluate the Options**:
- Option A: H2O (Water) - This is the correct answer as it is the source of the oxygen released.
- Option B: Glucose - This is a product of photosynthesis, not a source of oxygen.
- Option C: Carbon Dioxide - This is used in the process but does not directly provide the oxygen.
- Option D: NCH2O - This is not relevant to the process of photosynthesis.

6. **Conclude the Answer**:
- Therefore, the source of oxygen evolved during photosynthesis is **H2O (Water)**.

### Final Answer:
The source of oxygen evolved during photosynthesis is **H2O (Water)**.

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