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: Microbiology
[{'content': 'True about rotavirus vaccine: \nSelect and explain. \nA. Killed vaccine, B. Given subcutaneous, C. Pentavalent vaccine, D. Should be given before 5 years', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c. Pentavalent vaccine', 'role': 'assistant'}]