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: Pathology
Amyloid is best identified by - 
Select and explain. 
A. Staining with methyl violet, B. Secondary fluorescence in UV light with riboflavin, C. Congo red, D. Green birefringence of stained amyloid when viewed by polarizing microscope
D: Green birefringence of stained amyloid when viewed by polarizing microscope
Answer: D: Green birefringence of stained amyloid when viewed by polarizing microscope 
Explanation: Ans. is 'd' i.e., Green birefringence of stained amyloid when viewed by polarizing microscope