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': 'In one single visit, a 9 month-old, un-immunized child can be given the following vaccination - \nSelect and explain. \nA. Only BCG, B. BCG, DPT-1, OPV-1, C. DPT-1, OPV-1, Measles, D. BCG, DPT-1, OPV-1, Measles', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]