This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Types of vaccines, Subject name: Pediatrics
Which vaccine can not be used in adults? 
Select and explain. 
A. Hep A, B. MMR, C. DPT, D. Pneumococcal
C: DPT
Answer: C: DPT 
Explanation: -Tdap vaccine (single dose) is recommended in adolescents / adults & not DTP - DTP cannot be given beyond 7yrs of age. -Tdap contains lesser amount of Diphtheria & Peussis antigens, compared to DTP - Remaining all vaccines given in the question can be given to adults according to requirement. EXTRA EDGE: Vaccines recommended in adolescents: Tdap HPV Td Influenza TT JE Pneumococcal Rabies