This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: mycology, Subject name: Microbiology
[{'content': "Which of the following stains is used to demonstrate yeast forms of cryptococci in tissue sections \nSelect and explain. \nA. Mucicarmine, B. Perl's, C. Sudan black, D. Masson Fontana", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cryptococcus is stained by gram stain, mucicarmine stain, H & E, PAS. Masson Fontana: melanin granules in the cytoplasm of tumor cells. Sudan black stains lipid. Perl&;s- iron deposits. Reference: Textbook of Microbiology; Baveja; 4th edition', 'role': 'assistant'}]