Several factories were pouring their wastes in rivers A and B. Water samples were collected from these two rivers. It was observed that sample collected from river A was acidic while that of river B was basic. The factories located near A and B are<b>(a) </b>Soaps and detergents factories near A and alcohol distillery near B.<b>(b) </b>Soaps and detergents factories near B and alcohol distillery near A.<b>(c) </b>Lead storage battery manufacturing factories near A and soaps and detergents factories near B.<b>(d) </b>Lead storage battery manufacturing factories near B and soaps and detergents factories near A.