Buna-N synthetic rubber is a copolymer of

Options

A. `H_2C = CH - CH = CH_2 and C_6H_5 - CH = CH_2`
B. `CH_2=CH-CN and CH_2=CH-CH=CH_2`
C. `CH_2=CH-CN and CH_3=CH-underset(CH_3)underset(|)(C )-CH_(2)`
D. `CH_2=CH-overset(Cl)overset(|)(C )=CH_2 and CH_2=CH-C-CH_2`

Answer

B