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Which of the following is not one of the ways to prevent water pollution?

A)  Toxic products like household chemicals and cleaning agents should be stored and disposed properly.

B)  Pills, liquid or powder medications or drugs should not be thrown into the drain.

C)  Farmers should try using natural fertilisers and pesticides.

D)  Cooking oil, ghee, mayonnaise and fats should be poured down the drains.