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
Dye used in fluorescent microscopy - 
Select and explain. 
A. Thioflavin T, B. Congo red, C. Brilliant blue, D. Auramine
D: Auramine
Answer: D: Auramine 
Explanation: Ans. is `D' i.e., Auramine