The copolymer formed by addition polymerization of styrene and acrylonitrile in the presence of peroxide is:

The copolymer formed by addition polymerization of styrene and acrylonitrile in the presence of peroxide is represented by options (A), (C) and (D)
Styrene is C6H5−CH=CH2 and acrylonitrile is CH2=CH−CN