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: Medicine
[{'content': 'MC blood transfusion reaction is - \nSelect and explain. \nA. Febrile nonhemolytic transfusion reaction, B. Hemolysis, C. Transmission of infections, D. Electrolyte imabalnce', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]