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
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: None