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': '4 components of RCH elaborated ? \nSelect and explain. \nA. Prevention of STD, B. Family planning, C. Child survival, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is *d' i.e., All", 'role': 'assistant'}]