In photosynthesis, oxygen is liberated during

Options

A. Hydrolysis of carbohydrates
B. Breakdown of proteins
C. Reduction of `CO_(2)`
D. Hydrolysis of water.

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 takes place in the presence of sunlight and chlorophyll.

2. **Identifying the Reactants**: The main reactants in photosynthesis are carbon dioxide (CO₂) and water (H₂O). These reactants are essential for the formation of glucose (C₆H₁₂O₆) and the liberation of oxygen (O₂).

3. **Recognizing the Role of Water**: During photosynthesis, water undergoes a process called hydrolysis. This means that water molecules are split into hydrogen and oxygen. The oxygen produced is released into the atmosphere.

4. **Evaluating the Options**:
- **Hydrolysis of Carbohydrates**: This option is incorrect because carbohydrates are formed during photosynthesis, not broken down.
- **Breakdown of Proteins**: This option is also incorrect as the breakdown of proteins does not occur during photosynthesis.
- **Reduction of Carbon Dioxide**: While carbon dioxide is reduced to form glucose, the oxygen released is not from this process.
- **Hydrolysis of Water**: This is the correct option because it is the process that liberates oxygen during photosynthesis.

5. **Conclusion**: The correct answer to the question "In photosynthesis, oxygen is liberated during" is the hydrolysis of water.

**Final Answer**: Hydrolysis of water.

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