`CH_(3)-underset((a))underset(Br)underset(|)overset(CH_(3))overset(|)C-CH_(3)," "CH_(3)-underset((b))underset(Br)underset(|)CH-CH_(3)," "CH_(3)-underset((C))CH-Br`
Compare rate of `E_(2)` reaction :
A. (A) Cgtbgta
B. (b) Agtbgtc
C. (c ) bgtagtc
D. (d) Cgtagtb