A and B are two funtional isomers of compound `C_(3)H_(6)O`. On heating with NaOH and `I_(2)`, isomer B forms yellow precipitate of iodoform whereas isomer A does not form any precipitate. Write the structures of A and B.

Explanation

To solve the problem, we need to identify the two functional isomers of the compound with the molecular formula \( C_3H_6O \). We know that one of the isomers forms a yellow precipitate of iodoform when treated with iodine and sodium hydroxide, while the other does not.

### Step 1: Identify the functional isomers of \( C_3H_6O \)

The molecular formula \( C_3H_6O \) indicates that we have three carbon atoms, six hydrogen atoms, and one oxygen atom. The possible functional isomers include:
1. **Acetone (2-propanone)**: \( CH_3COCH_3 \) - a ketone
2. **Acetaldehyde (ethanal)**: \( CH_3CHO \) - an aldehyde

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