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: Microbiology
[{'content': 'Endoscopy tube sterilized by ? \nSelect and explain. \nA. 2 % glutaraldehyde, B. Na hypochlorite, C. Ethylene dioxide, D. Ionizing radiation', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 2 % glutaraldehyde", 'role': 'assistant'}]