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
Modified Cornoy's solution, used as a chemical cauterization agent, has which of these components missing from original Cornoy's solution? 
Select and explain. 
A. Chloroform, B. Glacial acetic acid, C. Ferric chloride, D. Alcohol
A: Chloroform
Answer: A: Chloroform 
Explanation: 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.