This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Venous Disorders, Subject name: Surgery
[{'content': 'The most common cause of superficial thrombophlebitis is: \nSelect and explain. \nA. Intravenous catheters/infusion, B. DVT, C. Varicose veins, D. Trauma', 'role': 'user'}, {'content': "Answer: A \nExplanation: SUPERFICIAL THROMBOPHLEBITIS This is a superficial venous thrombosis, most commonly caused by infusions of IV fluids Causes of Superficial Thrombophlebitis Venepuncture and IV infusion (MC) Trauma (especially to varicose veins) Buerger's disease Malignancy (Pancreas)", 'role': 'assistant'}]