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
[{'content': 'A water sample is considered satisfactory by a presumptive coliform count when the count is atleast \nSelect and explain. \nA. 0/100ml, B. 1-3/100ml, C. 4-10/100ml, D. More than 10/100ml', 'role': 'user'}, {'content': "Answer: A \nExplanation: BACTERIOLOGICAL QUALITY OF DRINKING WATER ORGANISMS GUIDELINE VALUE E. coli or thermotolerant coliform bacteria Must not be detected in any 100 ml sample Total coliform bacteria Must not be detected in any 100 ml sample Ref: K. PARK's TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE, 25th edition, page no. 782.", 'role': 'assistant'}]