A compound (A) on oxidation gives B `(C_(2)H_(4)O_(2))`. (A) also reacts with dil. NaOH and on subsequent heating forms (C). The compound (C) on catalytic hydrogenation gives (D). Identify A, B, C, D and write down the reactions involved.

Explanation

To solve the problem step by step, we will identify the compounds A, B, C, and D, and write down the reactions involved.

### Step 1: Identify Compound B
The problem states that compound (A) on oxidation gives compound (B) with the molecular formula \( C_2H_4O_2 \).

- The molecular formula \( C_2H_4O_2 \) corresponds to ethanoic acid (acetic acid), which is a carboxylic acid.

**Reaction:**
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