This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Stain not used for lipids 
Select and explain. 
A. Oil red O, B. Congo red, C. Sudan 3, D. Sudan black
B: Congo red
Answer: B: Congo red 
Explanation: Ref Bancrofts 's histopathology 5/e p204 Congo red is used for staining amyloid and not lipids