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 ail 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: Ans. is 'b' i.e., It is applied to all nuclear families of less then 10 years duration o 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'}]