The oxygen in photosynthesis is released from

Options

A. `CO_(2)`
B. `H_(2)O`
C. Carbohydrate
D. Chlorophyll.

Answer

### Step-by-Step Solution:

1. **Understanding Photosynthesis**: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose. This process primarily occurs in the chloroplasts of plant cells.

2. **Raw Materials**: The main raw materials required for photosynthesis are carbon dioxide (CO2) and water (H2O). Carbon dioxide is absorbed from the atmosphere through the stomata in leaves, while water is absorbed from the soil through the roots.

3. **The Role of Light**: Light energy, usually from the sun, is essential for photosynthesis. It provides the energy needed to drive the chemical reactions involved in the process.

4. **Photolysis of Water**: During the light-dependent reactions of photosynthesis, water molecules (H2O) undergo a process called photolysis. This is where water is split into hydrogen ions (H+) and oxygen (O2) in the presence of light energy.

5. **Release of Oxygen**: The oxygen produced during the photolysis of water is released as a byproduct into the atmosphere. This is the oxygen that we breathe.

6. **Conclusion**: Therefore, the oxygen released during photosynthesis comes specifically from the splitting of water molecules, not from carbon dioxide, carbohydrates, or chlorophyll.

### Final Answer:
The oxygen in photosynthesis is released from **water (H2O)**.

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