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: Microbiology
[{'content': 'An HIV positive female presents with an indurated ulcer over the tongue. Laboratory findings show growth in cornmeal agar at 20-degree Celsius, microscopy showing hyphae and growth in human serum at 37-degree Celsius show budding yeasts. The probable cause is - \nSelect and explain. \nA. Candida albicans, B. Histoplasmosis, C. Blastomycosis, D. Coccidioidomycosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]