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: Social & Preventive Medicine
Sputum can be disinfected by all except? 
Select and explain. 
A. Autoclaving, B. Boiling, C. Cresol, D. Chlorhexidine
D: Chlorhexidine
Answer: D: Chlorhexidine 
Explanation: Ans is 'd' i.e., Chlorhexidine Sputum is disinfected by boiling, autoclaving, incineration, deep hole burning, 5% phenol or 5% cresol.