Which of the following pairs of compounds may be regarded
both as functional isomer and position isomer?

Options

A. Benzyl alcohol and methoxy benzene
B. o-cresol and p-cresol
C. Benzyl alcohol and o-cresol
D. Benzyl alcohol and benzyl methyl ether

Explanation

To solve the question regarding which pairs of compounds can be regarded as both functional isomers and position isomers, we will follow these steps:

### Step 1: Understand the Definitions
- **Functional Isomers**: Compounds that have the same molecular formula but different functional groups.
- **Position Isomers**: Compounds that have the same molecular formula and functional groups, but the position of the functional groups differs.

### Step 2: Analyze Each Pair of Compounds
We will analyze the given pairs of compounds one by one.

#### Pair 1: Benzyl Alcohol and Methoxybenzene
- **Benzyl Alcohol**: C6H5CH2OH
- **Methoxybenzene (Anisole)**: C6H5OCH3
- **Analysis**:
- Same molecular formula: Yes (C8H10O)
- Different functional groups: Yes (alcohol vs. ether)
- Different positions: No (the functional groups are different).
- **Conclusion**: They are functional isomers but not position isomers.

#### Pair 2: Ortho-Cresol and Para-Cresol
- **Ortho-Cresol**: C6H4(OH)(CH3) at the 1,2 position
- **Para-Cresol**: C6H4(OH)(CH3) at the 1,4 position
- **Analysis**:
- Same molecular formula: Yes (C7H8O)
- Different functional groups: No (both are phenols).
- Different positions: Yes (the position of the methyl group differs).
- **Conclusion**: They are position isomers but not functional isomers.

#### Pair 3: Benzyl Alcohol and Ortho-Cresol
- **Benzyl Alcohol**: C6H5CH2OH
- **Ortho-Cresol**: C6H4(OH)(CH3)
- **Analysis**:
- Same molecular formula: Yes (C7H8O)
- Different functional groups: Yes (alcohol vs. phenol).
- Different positions: Yes (the position of the functional groups differs).
- **Conclusion**: They are both functional isomers and position isomers.

#### Pair 4: Benzyl Alcohol and Benzyl Methyl Ether
- **Benzyl Alcohol**: C6H5CH2OH
- **Benzyl Methyl Ether**: C6H5OCH2CH3
- **Analysis**:
- Same molecular formula: No (different molecular formulas).
- Different functional groups: Yes (alcohol vs. ether).
- **Conclusion**: They are neither functional nor position isomers due to different molecular formulas.

### Step 3: Final Answer
The pair of compounds that can be regarded as both functional isomers and position isomers is:
- **Benzyl Alcohol and Ortho-Cresol**.