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': 'Sputum can be disinfected by all except: \nSelect and explain. \nA. Auto claving, B. Boiling, C. Cresol, D. Chlorhexidine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. d. Chlorhexidine Sputum can be disinfected by autoclaving, boiling or Cresol. Chlorhexidine has no role in disinfection of sputum. "Chlorhexidine (hibitane) is one of the most useful skin antiseptic. Creams and lotion containing 1% Chlorhexidine are recommended for burns and hand disinfection."', 'role': 'assistant'}]