Write structures of compounds A,B and C in each of the following reactions:
(i) `C_(6)H_(5) Br overset("Mg/dry ether")rarr A underset((b)H_(3)O^(+))overset((a) CO_(2)(g))rarr B overset(PCl_(5))rarr C`
(ii) `CH_(3)CN underset((b) H_(3)O^(+))overset((a) SnCl_(2)//HCl)rarr A overset("dil."NaOH)rarr B overset(Delta)rarr C`

Explanation

To solve the given question, we will analyze each reaction step by step and identify the structures of compounds A, B, and C.

### Part (i): Reaction of C₆H₅Br with Mg in dry ether

1. **Starting Compound**: The reaction begins with bromobenzene (C₆H₅Br).
- **Structure**:
\[
\text{C}_6\text{H}_5\text{Br}
...