To get DDT-chloro benzene has to reacts with following compound

DDT, or dichlorodiphenyltrichloroethane, is a colourless, tasteless, and practically odourless crystalline chemical compound that is an organochloride. Developed as an insecticide, it became notorious for its environmental effects.

The IUPAC name of DDT according to the structure is 1,1,1-Trichloro-2,2-bis(4-chlorophenyl) ethane.

Hence, the correct answer is option (A) 1,1,1–Trichloro–2, 2–bis (4-chlorophenyl) ethane.