Tertiary alkyl halide are practially inert to substitution by `SN^(2)` mechanism because of-

Options

A. the carbocation formed is unstable
B. there is steric hindrace
C. there is inductive effect
D. the rate of reaction is faster is `S_(N^2)` mechanism.

Answer

B

Explanation

In tertiary alkyl halides steric hindrance does not allow subsitution by `S_(N^2)` mechanism in which the numbleophile attacks on the carbon atom and the reaction takes place in single step.