Which of the following chemicals cause water pollution?

Q. Which of the following chemicals cause water pollution?

1. Arsenic

2. Copper

3. Zinc

Select the correct answer from the following codes

A.            Only 1

B.            Only 1 and 2

C.            Only 2 and 3

D.            1,2 and 3

Answer: 1,2 and 3

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