Assertion (A): High levels of Biochemical Oxygen Demand (BOD) in water indicate significant organic pollution.
Reason (R): BOD measures the amount of oxygen required by microorganisms to decompose organic matter in water.
1
Both A and R are true, and R is the correct explanation of A.
2
Both A and R are true, but R is not the correct explanation of A.
3
A is true, but R is false.
4
A is false, but R is true