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': 'Best disinfectant for endoscopes is: \nSelect and explain. \nA. Hypochlorite, B. Formaldehyde, C. Glutaraldehyde, D. Chlorhexidine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Activated 2% alkaline glutaraldehyde is used for decontaminating flexible endoscopes.\nAdvantages\n\n\xa0Relatively non-corrosive\n\xa0Will kill spores with prolonged exposure (3- 10 hours). \n\nDisadvantages\nToxic. Irritant. \nPossible alternatives:\n\n\xa0Ortho-phthalaldehyde (OPA) peracetic acid.\n\xa0Chlorine dioxide (ClO2) products (such as Tristel).\n\xa0Super-oxidized water (Sterilox).\n\nAdvantages of these newer agents are - rapidly sporicidal, mycobactericidal and viricidal. BUT remember - No agent is clearly superior to the others and a thorough assessment needs to be\xa0performed before an alternative agent is chosen.', 'role': 'assistant'}]