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
Stain used for tissue fungus study is - 
Select and explain. 
A. PAS, B. Von kossa, C. Alizarin red, D. LPCB
A: PAS
Answer: A: PAS 
Explanation: 1- Lactophenol cotton blue stain 2- Fungi are very easily visualized in a PAS reaction with Schiff's reagent, this method now being a standard 3- PAS and methenamine silver staining for histological specimens