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': 'Pit latrine has depth of_____________ \nSelect and explain. \nA. 4-Feb, B. 6-Apr, C. 10-Jun, D. 12-Oct', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., 10-12", 'role': 'assistant'}]