This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
[{'content': 'Safe yield of a water supply source is the yield that is adequate for? \nSelect and explain. \nA. 80% of the year, B. 90% of the year, C. 95% of the year, D. The whole of the year', 'role': 'user'}, {'content': "Answer: C \nExplanation: Water for meeting the requirements of a community can be obtained from various sources like rain, surface water and groundwater. The safe yield of a source of water is defined as the yield that is adequate for 95% of the year. Ref: Park's Textbook of Preventive and Social Medicine, 20th edition, p617", 'role': 'assistant'}]