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
Which of the following is the most common cause of Superficial Thrombophlebitis? 
Select and explain. 
A. Intravenous catheters / Infusion, B. DVT, C. Varicose veins, D. Trauma
A: Intravenous catheters / Infusion
Answer: A: Intravenous catheters / Infusion 
Explanation: 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