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Question

Oil refineries, paper factories, textile and sugar mills, chemical factories are responsible for water pollution. These industries discharge harmful chemicals into rivers and streams and pollute water. The chemicals released include ________.
  1. arsenic
  2. lead
  3. fluorides
  4. all of the above

A
lead
B
all of the above
C
arsenic
D
fluorides
Solution
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The correct option is D all of the above
Oil refineries, paper factories, textile and sugar mills, chemical factories are responsible for water pollution.These industries discharge harmful chemicals into revers and streams, and pollute water. The chemicals released include arsenic, lead and fluorides which lead to toxicity in plants and animals.

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