For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.

Question: For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
[A].

10000

[B].

5

[C].

500

[D].

1000

Answer: Option B

Explanation:

No answer description available for this question.