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: Medicine
All can be used as endoscopic sclerosants in the treatment of variceal bleeding, except - 
Select and explain. 
A. Polydochyl, B. Cynoaciylate, C. Alcohol, D. Acetic acid
D: Acetic acid
Answer: D: Acetic acid 
Explanation: None