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': 'Which vaccine cannot be used in adults? \nSelect and explain. \nA. Hep A, B. MMR, C. DPT, D. Pneumococcal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: c. DPT(Ref: IAP Guidebook on Immunization 2013-14, p 387)Tdap vaccine (single dose) is recommended in adolescents / adults & not DTPTdap contains lesser amount of Diphtheria & Pertussis antigens, compared to DTP', 'role': 'assistant'}]