What is the relation between methyl ethanoate and `3-` hydroxy propanal `:`

Options

A. Chain isomers
B. Positional isomer
C. Functional isomer
D. Metamers

Explanation

To determine the relationship between methyl ethanoate and 3-hydroxypropanal, we need to analyze their structures and functional groups.

### Step 1: Identify the structure of methyl ethanoate
Methyl ethanoate is an ester with the following structure:
- It has the formula CH3COOCH3.
- The functional group present is the ester group (-COO-).

### Step 2: Identify the structure of 3-hydroxypropanal
3-hydroxypropanal is an aldehyde with the following structure:
- It has the formula CH2(OH)CH2CHO.
- The functional group present is the aldehyde group (-CHO) and a hydroxyl group (-OH).

### Step 3: Compare the functional groups
- Methyl ethanoate contains an ester functional group.
- 3-hydroxypropanal contains an aldehyde functional group and a hydroxyl group.

### Step 4: Determine the type of isomerism
Since the two compounds have different functional groups (ester vs. aldehyde), they cannot be chain isomers, positional isomers, or metameric isomers. Instead, they are classified as functional isomers because they have the same molecular formula (C4H8O3) but different functional groups.

### Conclusion
The relationship between methyl ethanoate and 3-hydroxypropanal is that they are functional isomers.