Oxygen which is liberated during photosynthesis, comes from

Options

A. `CO_(2)`
B. ` H_(2)O `
C. chlorophyll
D. phosphoglyceric acid

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where the oxygen that is released during photosynthesis comes from.

2. **Analyzing the Options**:
- **Option 1: CO2**: Carbon dioxide (CO2) is used in the formation of carbohydrates during photosynthesis, specifically in the Calvin cycle. Therefore, it does not directly produce oxygen.
- **Option 2: Water (H2O)**: Water is split during the light-dependent reactions of photosynthesis, specifically in Photosystem II. This process is called photolysis, which produces oxygen as a byproduct.
- **Option 3: Chlorophyll**: Chlorophyll is a pigment that absorbs light energy for photosynthesis but does not produce oxygen itself. Thus, this option is incorrect.
- **Option 4: Phosphoglyceric Acid (PGA)**: PGA is a three-carbon compound formed during the Calvin cycle and does not contribute to the release of oxygen. Therefore, this option is also incorrect.

3. **Conclusion**: Based on the analysis, the correct answer is **Option 2: Water (H2O)**, as it is the source of the oxygen released during photosynthesis.