Name two reagents which can be used to convert `gtC = O` to `gt CH_(2)` group.

Explanation

To convert a carbonyl group (C=O) to a methylene group (CH2), we can use the following two reagents:

1. **Wolf-Kishner Reduction**:
- The Wolf-Kishner reduction is a method that involves hydrazine (NH2NH2) and a strong base such as potassium hydroxide (KOH).
- The carbonyl compound is treated with hydrazine to form a hydrazone, which is then subjected to a strong base and heat. This results in the complete reduction of the carbonyl group to a methylene group (CH2).

2. **Clemensen Reduction**:
- The Clemensen reduction involves the use of zinc amalgam (Zn-Hg) in the presence of hydrochloric acid (HCl).
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