Correct choice is (a) True
The explanation: Sulfonation in the benzene hydrocarbon series is that of polystyrene. Two types of product are of interest: one, water-insoluble, produced in bead form from styrene-divinylbenzene copolymer, and used as an ion-exchange resin; the other, water-soluble, made from styrene homopolymer, and employed as a synthetic gum, as a tanning agent, or as a soil-conditioning compound.