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': 'Which of the following is the most common cause of Superficial Thrombophlebitis? \nSelect and explain. \nA. Intravenous catheters / Infusion, B. DVT, C. Varicose veins, D. Trauma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Most common cause of superficial thrombophlebitis is an intravenous catheter. Ref: Hurst's The Hea By Valentin Fuster, Richard A. Walsh, Robe A. Harrington, 13th Edition, Chapter 109; Doctor C's Medical Guide By Joseph Ciabattoni, Page 102; Primary Care Medicine: Office Evaluation and Management of The Adult Patient By Allan H. Goroll, 6th Edition, Page 317; Sclerotherapy By Robe A. Weiss, Page 251", 'role': 'assistant'}]