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Water sample is called cleanest on the b...

Water sample is called cleanest on the basis of which one of the BOD values given below :

A

11 ppm

B

15 ppm

C

3 ppm

D

21 ppm

Text Solution

Verified by Experts

The correct Answer is:
C
Clean water could have BOD value of less than 5 ppm whereas highly polluted water could have a BOD value of 17 ppm or more.
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