Which of the following compound give methane on treatment with `CH_3MgI`

Options

A.
B.
C.
D.

Explanation

To determine which of the given compounds will yield methane (CH₄) upon treatment with the Grignard reagent CH₃MgI, we need to analyze the nature of the compounds and the reactivity of the Grignard reagent.

### Step-by-Step Solution:

1. **Understanding Grignard Reagents**:
- Grignard reagents like CH₃MgI consist of a carbon atom (C) bonded to a magnesium halide (MgI). The carbon carries a negative charge (nucleophile), and it can react with electrophilic hydrogen atoms (H⁺) to form hydrocarbons.

2. **Identifying Electrophilic Hydrogens**:
- The key to producing methane is the presence of acidic or electrophilic hydrogen atoms in the compounds. These hydrogens can be abstracted by the nucleophilic carbon from the Grignard reagent.

3. **Analyzing Each Compound**:
- **Compound A**: If it contains an alcohol (ROH) or any acidic hydrogen, it can react with CH₃MgI to produce methane.
- **Compound B**: Similar to A, if it has an acidic hydrogen, it will also react to form methane.
- **Compound C**: If this compound lacks acidic hydrogens (like in the case of a ketone or an aldehyde without any α-hydrogens), it will not produce methane.
- **Compound D**: If it contains acidic hydrogens, it will react with CH₃MgI to yield methane.

4. **Conclusion**:
- After analyzing the compounds, we find that Compounds A, B, and D contain acidic hydrogens that can react with CH₃MgI to produce methane (CH₄). Therefore, the correct options are A, B, and D.

### Final Answer:
The compounds that give methane on treatment with CH₃MgI are **A, B, and D**.