A. Exposure of a body of water ultraviolet rays
B. Discharge of industrial effluents into waterways
C. Passage of river water through a send bed
D. Addition of a measured quantity of chlorine to water
Correct Answer: Option B
B. Discharge of industrial effluents into waterways
Do you want to study Agricultural Extension in OOU? Before you apply for the OOU…
Do you want to study Agricultural Economics in OOU? Before you apply for the OOU…
Do you want to study Cooperative and Business Management in OOU? Before you apply for…
Do you want to study Home and Hotel Management in OOU? Before you apply for…
Do you want to study Animal Production in OOU? Before you apply for the OOU…
Do you want to study Crop Production in OOU? Before you apply for the OOU…