Assertion (A): A: Secondary treatment of sewage is also known as biological treatment. Reason (R): R: It involves the use of aerobic microbes to consume organic matter.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is NOT the correct explanation of A
- CA is true but R is false
- DA is false but R is true
✓ Correct answer: A
Want the full step-by-step reasoning?