The correct choice is (d) All of the mentioned
Explanation: BHC (Benzene Hexachloride or Hexachlorocyclohexane), in this Benzene is chlorinated in the liquid phase in the presence of an activation agent such as activating light, gamma rays, or elemental fluorine. A mixture of five isomers of 1,2,3,4,5,6-hexachlorocyclohexane is produced .