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: Pathology
[{'content': 'Which of the following is a cause of extravascular hemolysis - \nSelect and explain. \nA. Falciparum malaria, B. Sickle cell disease, C. Mismatched blood transfusion, D. Microthrombi in circulation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]