This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
Resolution power of light microscope is 
Select and explain. 
A. 2nm, B. 20 nm, C. 200 nm, D. 2000 nm
C: 200 nm
Answer: C: 200 nm 
Explanation: Ans :c) 200 nmThe resolving power of light microscope is limited by the wave length of light. With visible light, using the best optical system, the limit of resolution is 200- 300 nm.Extra points:* Wavelength of electron in Electron microscope- 0.0005nm* Resolving power of electron microscope -1 nm* Reflected light rather than transmitted light is med in Dark field /dark ground microscope