This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
The concentration of abate recommended for killing cyclops is - 
Select and explain. 
A. 2 mg/L, B. 1 mg/L, C. 5 mg/L, D. 0 mg/L
B: 1 mg/L
Answer: B: 1 mg/L 
Explanation: Control of cyclops: Straining through clothes Boiling at 60degC Chlorination at 5ppm concentration Lime 4 gram per gallon of water Abate 1 mg/L Barbel fish and Gambusia fish REFERENCE: PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE, 25TH EDITION, PG NO. 842