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In a river if its BOD percentage is high then
Options
(a) river is polluted
(b) rive is not polluted
(c) river is dry
(d) none of these
Correct Answer:
river is polluted
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Topics: Conservation and Environmental Issues
(111)
Subject: Biology
(4253)
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