This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Water, Subject name: Social & Preventive Medicine
[{'content': 'Safe yield of water is defined as? \nSelect and explain. \nA. Yield that is adequate for 95 per cent of the year, B. Yield that is adequate for 97 per cent of the year, C. Yield that is adequate for 99 per cent of the year, D. Yield that is adequate for 99.99 per cent of the year', 'role': 'user'}, {'content': 'Answer: A \nExplanation: - Safe yield is generally defined as the yield that is adequate for 95 per cent of the year. - Safe & wholesome water is: Free from colour / odour Free from chemicals Free from biological agents Usable for domestic purposes', 'role': 'assistant'}]