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
[{'content': 'Nuclear family consists of \nSelect and explain. \nA. Husband, wife and son, B. Husband, Wife and dependent children, C. Husband and wife only, D. Father, mother, husband and wife', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The nuclear or elementary family is universal in all human societies. It consists of the married couple and their children while they are still regarded as dependents.Park 23e pg: 683', 'role': 'assistant'}]