Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A) : If BOD level of water in a reservoir is less than 5 mgL-1, it is highly polluted.
Reason (R) : High BOD means high microbial activity.
Choose the correct answer from the options given below.
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