Amines are derivatives of ammonia and are classified as `1^@, 2^@ , and 3^@` Primary and secondary (but not teritary amines) form intermolecular hydrogen bonds and thus they boil at higher temperature than expected.Like ammonia, all amines are basic, although they differ in their basic nature.As amines are considered as derivatives of ammonia, quatemary ammonium salts are considered as derivatives of ammonium salts.Only the quatemary ammonium salts can show optical activity.
Methylethylpropyl amine is optically inactive because

Options

A. it is not tetrahederal
B. its molecule is superimposable on its mirror image
C. The enantiomers are rapidly interconverted
D. The nitrogen is `sp^(2)` hybridized

Answer

B