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': 'Stage of contraction of family stas at \nSelect and explain. \nA. Bih of first child, B. Bih of last child, C. Leaving home of first child, D. Marriage', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Leaving home of first child", 'role': 'assistant'}]