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': 'Thrombocytopenia is an adverse reaction of which vaccine: \nSelect and explain. \nA. BCG, B. DPT, C. MMR, D. Hep B', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Thrombocytopenia is found as an adverse reaction of MMR vaccine. Usually mild and self-limiting, occasionally may need steroid or platelet. Ref: Park 21st edition, page 107.', 'role': 'assistant'}]