The number of structure isomers possible from the molecular formula `C_(3)H_(9)N` is:

Answer

4

Explanation

Possible isomers of `C_(3)H_(9)N`
`CH_(3)-CH_(2)-underset(NH_(2))underset(|)CH_(2),CH_(3)-underset(NH_(2))underset(|)CH-CH_(2),`
`CH_(3)-CH_(2)-NH-CH_(3),CH_(3)-overset(CH_(3))overset(|)N-CH_(2)`