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: Dental
[{'content': "'POTABLE WATER' is one which: \nSelect and explain. \nA. Is safe drinking, B. Can be carried from one place to another, C. Found within 5 meters within the surface of earth, D. None of the above", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]