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
One of the following staining method is an example of negative staining - 
Select and explain. 
A. Graim's staining, B. Fontana's staining, C. India ink preparation, D. Ziehl-Neelsen staining
C: India ink preparation
Answer: C: India ink preparation 
Explanation: Why is it necessary to use stained preparations in microbiology?

Live bacteria do not show much structural details under the light microscope due to lack of contrast.
Hence it is customary to use staining techniques to produce colour contrast.


Methods are -