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': 'True about blood transfusion reaction -a) Complement mediated severe haemolysisb) Renal blood flow is decreasedc) Transfusion should not be stoppedd) Death is not seen \nSelect and explain. \nA. ac, B. ab, C. ad, D. bc', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]