`PGA` is reduced through

Options

A. `NADPH_(2)`
B. `FADH_(2)`
C. `CoA`
D. `CoQ`.

Answer

To solve the question "PGA is reduced through," we need to understand the process involved in the Calvin cycle, specifically how phosphoglyceric acid (PGA) is reduced.

### Step-by-Step Solution:

1. **Understanding PGA**:
- PGA (phosphoglyceric acid) is a 3-carbon compound formed during the Calvin cycle when carbon dioxide is fixed to ribulose bisphosphate (RuBP).

2. **Calvin Cycle Overview**:
- The Calvin cycle consists of three main stages: carbon fixation, reduction, and regeneration. The question pertains to the reduction phase.

3. **Reduction of PGA**:
- In the reduction phase, PGA is converted into glyceraldehyde-3-phosphate (G3P). This conversion involves the addition of electrons and protons to PGA.

4. **Role of NADPH**:
- The reduction of PGA is facilitated by NADPH, which is produced during the light-dependent reactions of photosynthesis. NADPH provides the necessary electrons for the reduction process.

5. **Conclusion**:
- Therefore, the correct answer to the question "PGA is reduced through" is that PGA is reduced through **NADPH**.

### Final Answer:
PGA is reduced through **NADPH**.