Identify the compounds A, B and C in the following reaction :
`CH_(3)-Broverset(Mg//ether)rarr(A)overset((i)CO_(2))underset((i)"Water")rarr(B)overset(CH_(3)OH//H)underset(Delta)rarr(C)`

Explanation

To identify the compounds A, B, and C in the given reaction sequence, let's break down the reaction step by step.

### Step 1: Formation of Compound A
The reaction begins with `CH3-Br` reacting with magnesium in the presence of ether. This reaction leads to the formation of a Grignard reagent.

- **Reaction**:
\[
CH_3Br + Mg \xrightarrow{ether} CH_3MgBr
...