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': 'Saddle embolus causes sudden death by blocking \nSelect and explain. \nA. Coronary arteries, B. Cerebral arteries, C. Pulmonary arteries, D. Renal arteries', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]