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
Shadow casting is done in 
Select and explain. 
A. Light microscopy, B. Electron microscopy, C. Dark field microscopy, D. Atomic force microscopy
B: Electron microscopy
Answer: B: Electron microscopy 
Explanation: Shadow casting - specimen is coated with a thin film of platinum or other heavy metals to increase the contrast of Electron microscope.