Consider the following bromides:

The correct order of `S_(N)1` reactivity is

Answer

C

Explanation

The reactivity in `S_(N)1` reactions depends upon the stability of the intermediate carbocations. Since the stability of the carbocations derived from (A), (B) and (C) follows the order:

therefore, `S_(N)1` reactivity of these three bromides follows the order: BgtCgtA, i.e., option (c) is correct.