Based on the structures how is the reduction ability of `H_(3)PO_(2) or H_(3)PO_(3)` accounted for?

Explanation

To determine the reduction ability of H₃PO₂ (phosphorous acid) and H₃PO₃ (phosphoric acid), we can analyze their structures and the number of acidic hydrogen atoms they contain. Here’s a step-by-step solution:

### Step 1: Identify the Structures
- **H₃PO₂** (phosphorous acid) has the structure:
```
H
|
H - P = O
...