This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunization, Subject name: Pediatrics
[{'content': 'According to latest guidelines of vaccination, which of the following is applicable at the age of 5 years? \nSelect and explain. \nA. DT booster + Vitamin A, B. DT, C. DPT + OPV, D. DPT + Vitamin A', 'role': 'user'}, {'content': "Answer: D \nExplanation: d. DPT + Vitamin A(Ref: Nelson's 20/e p 3212, Ghai 8/e p 193-194)DPT booster & Vitamin A supplementation are recommended at 5 years age.", 'role': 'assistant'}]