Give the formula of [A] and [B]
`CH_(3)-overset(O)overset(||)C-OHoverset(SOCl_(2))rarr[A]overset(LiAlH_(4))rarr[B]`

Explanation

To solve the question, we need to identify the compounds [A] and [B] based on the provided reactions. Let's break it down step by step.

### Step 1: Identify the starting compound
The starting compound is given as CH₃COOH, which is acetic acid (ethanoic acid).

### Step 2: Reaction with SOCl₂
When acetic acid (CH₃COOH) reacts with thionyl chloride (SOCl₂), it converts the carboxylic acid into an acyl chloride. The reaction can be represented as follows:
\[ \text{CH}_3\text{COOH} + \text{SOCl}_2 \rightarrow \text{CH}_3\text{COCl} + \text{SO}_2 + \text{HCl} \]
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