How many structural isomers are possible from molecular formula `C_(3)H_(9)N`

Options

A. one
B. two
C. three
D. four.

Answer

D

Explanation

Four isomers of `C_(3)H_(9)N` are
(i) `underset("1-Aminopropane")(CH_(3)CH_(2)CH_(2)NH_(3))` (ii) `underset(2^(@)-"Aminopropan")(CH_(3)-overset(CH_(3))overset(|)(CH)-NH_(2))`
(iii) `underset ("N-Methylaminoethane")(CH_(3)CH_(2)-overset(H)overset(|)(N)-CH_(3))`
(iv) `underset("N, N-Dimethylaminomethane")(CH_(3)-overset(CH_(3))overset(|)(N)-CH_(3))`