Which of the following statements is correct?

Asked in GPSC Prelims CSP 2 2022 · Topic: Pollution (Water Pollution: Sources, common pollutants, water quality indicators (BOD, COD, DO), effects, control measures.)

1. Dissolved oxygen of a water body is expected to be high when its temperature is low
2. Dissolved oxygen of a water body is expected to be high when its temperature is high
3. Dissolved oxygen of a water body is expected to be low when its temperature is low
4. Dissolved oxygen of a water body is inde‐ pendent of its temperature

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