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
Disinfection of sputum is done by -a)  Boilingb)  Autoclavingc)  Sunlightd)  Burninge)  Airing 
Select and explain. 
A. ae, B. edb, C. abd, D. bd
C: abd
Answer: C: abd 
Explanation: None