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
Catgut suture is packed in 
Select and explain. 
A. Isopropyl alcohol, B. Ethanol, C. Formalin, D. Gluteraldehyde
A: Isopropyl alcohol
Answer: A: Isopropyl alcohol 
Explanation: None