This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'All indicate criteria for "problem village" except \nSelect and explain. \nA. Drinking water source is not within 1.6 km in plans, B. Drinking water source is not within 100 m elevation in hilly, C. Water is more than depth of 15 meters, D. High risk of water pollution', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]