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': 'Family consisting of a mother and her children is \nSelect and explain. \nA. Problem family, B. Broken family, C. Dysfunctional family, D. Matrifocal family', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]