Assertion: Discharge of sewage into river results into a sharp details in disolved oxygen
Reason:- Micro-organisms invovled in biodegradation of organic matter in the reciving water body produce a lot of oxygen to facilitate degration of organic matter.
A. If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.
B. If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion
C. If Assertion is True but the Reason if False.
D. If both Assertion `&` Reason are false.