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
PAS stains the following except - 
Select and explain. 
A. Glycogen, B. Lipids, C. Fungal cell wal, D. Basement membrane of bacteria
D: Basement membrane of bacteria
Answer: D: Basement membrane of bacteria 
Explanation: TABLE 2.1: Common Special (Histochemical) Stains in Surgical Pathology (in Alphabetic Order of Constituents). 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