Write structure of A, B C and D in the following eactin sequence :
`{:(CH_(3)COCl overset(H_(2)//Pd-BaSO_(4))toA overset("dil. NaOH")toB overset(Delta)toC),(" "darrCH_(3)MgBr//H_(3)O^(+)),(" "D):}`
(b) Arrange the following compounds in the increasing order of their boiling points :
`CH_(3)CHO, CH_(3)CH_(2)OH,CH_(3)OCH_(3),CH_(3)COOH`

Explanation

### Step-by-Step Solution

#### Part 1: Structures of A, B, C, and D

1. **Identify the starting compound**: The reaction begins with **acetyl chloride (CH3COCl)**.

**Structure**:
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