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
[{'content': 'Resolution provided by light microscope is: \nSelect and explain. \nA. 200 nm, B. 20 nm, C. 0.2 nm, D. 2.0 nm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Resolving Power are :\nLight microscope – 0.25 um – 0.3 um – 200-300 nm\nElectron microscope – 2-10 A = 0.2 – 1 nm', 'role': 'assistant'}]