Arrange the following in the increasing order of their boiling points:

These are the options for the question :Arrange the following in the increasing order of their boiling points:

A : Butanamine, B: N,N-Dimethylethanamine, C: N- Etthylethanaminamine
a. C<B<A
b. A<B<C
c. A<C<B
d. B<C<A

The correct answer is -d. B<C<A
In primary amine intermolecular association due to H-bonding is maximum
while in tertiary it is minimum.