Which of the following pairs will produce anisole?

Options

A. `C_6 H_5 CH_3 , C_6H_4 COCl and AlCl_3`
B. `C_6 H_5 OH , NaOH and CH_3I`
C. `C_6H_6 OH and FeCl_3 `
D. `CH_3 CHO and RMgX`

Explanation

To determine which of the given pairs will produce anisole, we need to understand the structure of anisole and the reactions involved in its synthesis. Anisole (methoxybenzene) has the molecular formula C7H8O and consists of a benzene ring with a methoxy (-OCH3) group attached.

### Step-by-Step Solution:

1. **Identify the Structure of Anisole**:
- Anisole is an aromatic compound with a benzene ring and a methoxy group (-OCH3).
- The general formula for anisole is C6H5OCH3.

2. **Determine the Synthesis Method**:
- One common method to synthesize anisole is through the Williamson Ether Synthesis.
- This involves reacting phenol (C6H5OH) with a methyl halide (like methyl iodide, CH3I) in the presence of a strong base (like sodium hydroxide, NaOH).

3. **Write the Reaction**:
- The reaction can be represented as:
\[ \text{C6H5OH} + \text{CH3I} \xrightarrow{\text{NaOH}} \text{C6H5OCH3} + \text{NaI} + \text{HI} \]
- Here, phenol (C6H5OH) acts as the nucleophile, and the methyl iodide (CH3I) provides the methyl group.

4. **Analyze the Given Options**:
- Look for pairs that include phenol and a methyl halide (like CH3I or CH3Br) with a base.
- Other combinations that do not include these components will not produce anisole.

5. **Select the Correct Pair**:
- Based on the analysis, the correct pair that will produce anisole is:
- Phenol + Methyl Iodide (or any methyl halide) in the presence of a base like NaOH.

### Conclusion:
The pair that will produce anisole is **Phenol + Methyl Iodide (CH3I) with NaOH**.