Civil Services UPSC Mock Test Series 2025 (Prelims + Mains) General Knowledge Ecology and Environment Biodiversity
Consider the following statements:
Statement I: A river with a high biochemical oxygen demand indicates a healthy aquatic ecosystem.
Statement II: High biochemical oxygen demand signifies abundant organic matter, which can be a food source for aquatic organisms.
Which one of the following is correct in respect of the above statements?
1
Both Statement I and Statement II are correct, and Statement II is the correct explanation of Statement I.
2
Both Statement I and Statement II are correct, but Statement II is not the correct explanation of Statement I.
3
Statement I is correct, but Statement II is incorrect.
4
Statement I is incorrect, but Statement II is correct.