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
The most common cause of superficial throm-bophlebitis is 
Select and explain. 
A. Intravenous catheters / infusion, B. DVT, C. Varicose veins, D. Trauma
A: Intravenous catheters / infusion
Answer: A: Intravenous catheters / infusion 
Explanation: None