This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Pathology
The stain used for glycogen - 
Select and explain. 
A. PAS, B. Cango red, C. Prussian blue, D. Alician blue
A: PAS
Answer: A: PAS 
Explanation: Stain: Periodic acid-Schiff (PAS) Component/Tissue:Carbohydrates(paicularly glycogen),all mucins. Dyes: Periodic acid Schiff reagent(basic fuschin) Interpretation: glycogen and other carbohydrates: magenta nuclei: blue HARSH MOHAN Textbook of pathology 6th edition pg no 12