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: Unknown
Resolution provided by light microscope is: 
Select and explain. 
A. 200 nm, B. 20 nm, C. 0.2 nm, D. 2.0 nm
A: 200 nm
Answer: A: 200 nm 
Explanation: Resolving Power are :
Light microscope – 0.25 um – 0.3 um – 200-300 nm
Electron microscope – 2-10 A = 0.2 – 1 nm