The following pair of compounds which can be classified as positional isomers is

Options

A. `CH_3-CH_2-CH_2-C-underset(O)underset(||)C-CH_3 and CH_3-CH_2-CH_2-C-underset(O)underset(||)C-CH_3`
B. `CH_3-CH_2-CH_2-undersetOunderset(||)C-CH_3 and CH_2-underset(CH_3)underset(|)(CH)-CH_2-CHO`
C.
D. `CH_3-CH_2-CH_2-CH_2-CHO and CH_3-CH_2-CH_2-oversetOoverset(||)C-CH_3`

Answer

A

Explanation

Positional isomers are constitutional isomers that have the same carbon skeleton and the same functional groups but differ from each other in the location of the functional groups on or in the carbon chain.