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': "The following is true about the term 'New Families' – \nSelect and explain. \nA. It is a variant of the 3-generation family, B. It is applied to all nuclear families of less then 10 years duration, C. It is a variant of the joint family., D. It is applied to all nuclear families of less then 2 years duration", 'role': 'user'}, {'content': 'Answer: B \nExplanation: The term new family has recently come into vogue, it applies to all nuclear families which are less than 10 years of duration.', 'role': 'assistant'}]