This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Operation theatre sterilisation is done by \nSelect and explain. \nA. savlon cleansing, B. Carbolic acid spray, C. Ultra violet radition, D. Autoclave', 'role': 'user'}, {'content': 'Answer: C \nExplanation: UV rays are used to disinfect OT for 30-45 min exposure Formaldehyde gas also can be used for fumigation of operation theatres. Ref : Ananthanarayana textbook of Microbiology 9th edition Pgno : 33', 'role': 'assistant'}]