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: Surgery
[{'content': "Fogarty's catheter is used for \nSelect and explain. \nA. Removal of embolus from blood vessels, B. Parenteral hyperalimentation, C. Drainage of urinary bladder, D. Ureteric catheterisation", 'role': 'user'}, {'content': "Answer: A \nExplanation: Fogarty's catheter is used for removal of embolus from the blood vessels.", 'role': 'assistant'}]