Which one of the following pairs of compounds are functional isomers?

Options

A. `CH_(3)CH_(2)CH_(2)OH`,`(CH_(3))_(2)CHCH_(2)OH``CH_(3)CH_(2)CH_(2)OH`,`(CH_(3))_(2)CHCH_(2)OH`
B. `CH_(3)CH_(2)CH_(2)CH_(2)OH`,`(CH_(3))_(2)CHCH_(2)OH`
C. `CH_(3)CH_(2)CH_(2)OH`,`CH_(3)CH_(2)CH_(2)CI`
D. `CH_(3)CH_(2)CH_(2)OH`,`CH_(3)-O-CH_(2)CH_(3)`

Answer

d

Explanation

Function isomers have same molecular formula but different functional groups
`CH_(3)CH_(2)CH_(2)OH`and `CH_(3)-O-CH_(2)-CH_(3)` have same molecular formula i.e, `C_(3)H_(8)O` but different functional groups - OH and - O - respectively.