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
[{'content': 'Which of the following is a special stain used to diagnose fungal hyphae in tissues- \nSelect and explain. \nA. Masson trichome, B. Silver methenamine, C. Congo Red, D. Alizarin Red', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Silver methenamineo Gomori methamine silver stain (GMS) and periodic acid Schiff (PAS) are the two most common stains used to look for fungi in tissues and cytology specimens.", 'role': 'assistant'}]