Which of the following statements are true for photorespiration ?

Options

A. No synthesis of ATP
B. No synthesis of NADPH
C. Release of `CO_2`
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding Photorespiration**:
- Photorespiration is a light-dependent process that occurs in plants. It is initiated by the enzyme Rubisco.

2. **Analyzing the Statements**:
- **Statement 1**: "No synthesis of ATP" - This statement is true. During photorespiration, there is no production of ATP.
- **Statement 2**: "No synthesis of NADPH" - This statement is also true. Similar to ATP, NADPH is not synthesized during photorespiration.
- **Statement 3**: "Release of CO2" - This statement is true as well. Photorespiration results in the release of carbon dioxide.
- **Statement 4**: "All the above" - Since all the previous statements are true, this statement is also true.

3. **Conclusion**:
- Since all the statements (1, 2, and 3) are true, the correct answer is option 4: "All the above."

### Final Answer:
The correct option is **4. All the above**.

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