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': 'White piedra is caused by - \nSelect and explain. \nA. Piedra hortae, B. Pityrosporum orbicularea, C. Hortae wernickii, D. Trichosporum beigelli', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]