Question
Biology Question on 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
Answer
6 mg/L
Explanation
Solution
The correct answer is (D) : 6 mg/L.