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Environmental Issues

Four students were assigned a science project to find out the pollution levels of lakes in their surrounding. After analysing the quality of water samples, the BOD values were found as follows: Which among the following water samples is highly polluted ?

A
0.16 mg/L
B
0.6 mg/L
C
0.06 mg/L
D
6 mg/L

Solution:

D. 6 mg/L

Explanation
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