Supply the reagents in the following sequence of reations :
`(ii) CH_(4) overset([A])(to) CH_(3) Br overset([B]) (to) C_(6) H_(5) CH_(3) overset([C])(to) C_(6)H_(5)COOH`

Explanation

To solve the given sequence of reactions, we need to identify the appropriate reagents for each step. Let's break down the transformations step by step.

### Step 1: CH₄ to CH₃Br
- **Reagent A**: To convert methane (CH₄) to bromoethane (CH₃Br), we can use bromine (Br₂) in the presence of ultraviolet light (hv). This reaction proceeds via a free radical mechanism where bromine radicals abstract a hydrogen atom from methane, resulting in the formation of CH₃Br.

**Reagent A**: Br₂ (in the presence of light)

### Step 2: CH₃Br to C₆H₅CH₃ (Toluene)
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