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 one of the following reagents is not used as sclerosant in the treatment of bleeding varies- 
Select and explain. 
A. Ethyl alcohol, B. Ethanolamine oleate, C. Phenol, D. Sodium morrhuate
A: Ethyl alcohol
Answer: A: Ethyl alcohol 
Explanation: None