This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Social science, Mental health & Genetics, Subject name: Social & Preventive Medicine
The following is true about the term New families 
Select and explain. 
A. It is a variant of the 3 - generation family, B. It is applied to all nuclear families of less than 10 years duration, C. It is a variant of joint family, D. It is applied to all nuclear families of less than 2 years duration
B: It is applied to all nuclear families of less than 10 years duration
Answer: B: It is applied to all nuclear families of less than 10 years duration 
Explanation: Te term new families has come recently into vogue ,it is applied to those under 10 years duration and consists of parents and children. Ref:(p.740) 25 th edition Park's Textbook of Preventive and Social Medicine