The water pollution in river is measured by the dissolved amount of
- (a)Chlorine
- (b)Ozone
- (c)Nitrogen
- (d)Oxygen
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Official answer(d) Oxygen
Official answer(d) Oxygen
Official answer(c) Statement–I is correct but Statement–II is incorrect
Official answer(d) Aquatic plants absorb heavy metals and excess nutrients.
Official answer(b) 2 and 3 only
Official answer(b) 2 and 3 only
Official answer(a) 1 and 2 only
Official answer(b) 2 only