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
[{'content': "Modified Cornoy's solution, used as a chemical cauterization agent, has which of these components missing from original Cornoy's solution? \nSelect and explain. \nA. Chloroform, B. Glacial acetic acid, C. Ferric chloride, D. Alcohol", 'role': 'user'}, {'content': 'Answer: A \nExplanation: 100% ethanol: chloroform: glacial acetic acid in 6:3:1 radio with ferric chloride. Modified versions are chloroform free, however their effectiveness is not clear.', 'role': 'assistant'}]