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
A 13 year old girl with soft painful swelling on posterior aspect of thigh. Color Doppler showed multiple venous channels without any major arterial feeder. All of the following are liquid embolizing agents except 
Select and explain. 
A. Cyanoarylate, B. Sodiumtetradecyl sulphate, C. Polyvinyl alcohol, D. Absolute alcohol
C: Polyvinyl alcohol
Answer: C: Polyvinyl alcohol 
Explanation: Polyvinyl alcohol is not a liquid embolizing agent.