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
Sputum can be disinfected by 
Select and explain. 
A. Autoclave, B. Boiling, C. Cresol, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Sputum can be disinfected by all the above-mentioned methods Ref: Textbook of Microbiology Baveja 5th ed Pg 29