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': 'True about hand hygiene- \nSelect and explain. \nA. Betadine can cause irritation, B. Alcohol based preparation are used, C. Hot water is best, D. Gluteraldehyde is used', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Povidone-iodine is the best skin disinfectant\nPovidone-iodine (Betadine) is less irritant and cause less staining.\nAqueous and alcohol-based povidone-iodine preparations are widely used in skin disinfection including preoperative preparation of the skin.\nCommonly used skin disinfectants for hand washing are- □ Povidone-iodine (Betadine)\n\n→ Best \xa0Chlorhexidine\n□ Isopropyl alcohol', 'role': 'assistant'}]