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
40% formalin is used to sterilize? 
Select and explain. 
A. Plastic syringes, B. All microbes + spores, C. Clothes, D. Stitches
B: All microbes + spores
Answer: B: All microbes + spores 
Explanation: 40% formalin is used for the preservation of cadavers to prevent the putrefaction and also prevent the growth of bacteria. it destroys all microbes and its spores Ref Ananthanarayan & paniker's Textbook of Microbiology 9th edition pg no:34