For SN2 reaction, the increasing order of the reactivity of the following alkyl halides is:
(A) CH3CH2CH2CH2Br
(B) CH3CH2CH(Br)CH3
(C) (CH3)3CBr
(D) (CH3)2CHCH2Br
Choose the correct answer from the options given below :
1
(A) < (B) < (C) < (D)
2
(A) < (C) < (B) < (D)
3
(B) < (A) < (D) < (C)
4
(C) < (B) < (D) < (A)