Increasing order of reactivity of the following compounds for S_{N }1 substitution is


(a) 
(B)<(C)<(A)<(D) 
(b) 
(B)<(C)<(D)<(A) 
(c) 
(B)<(A)<(D)<(C) 
(d) 
(A)<(B)<(D)<(C) 
Increasing order of reactivity of the following compounds for S_{N }1 substitution is


(a) 
(B)<(C)<(A)<(D) 
(b) 
(B)<(C)<(D)<(A) 
(c) 
(B)<(A)<(D)<(C) 
(d) 
(A)<(B)<(D)<(C) 
S_{N}1 reaction proceeds via formation of carbocation
On comparing (A) and (B), in (A) there is formation of tertiary carbocation
after rearrangement while (B) is primary. So, (B)<(A)<(D)<(C)