Assertion (A) : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable. Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other water qualities.

• Both A and R are true and R is the correct explanation of A
• Both A and R are true but R is not a correct explanation of A
• A is true but R is false
• A is false but R is true.