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': 'Mycetoma foot can be caused by all the following except \nSelect and explain. \nA. Cladosporium, B. Exophiala jeanselmei, C. Madurella mycetoma, D. Allescheria boydii', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cladosporium causes Tinea nigra. Ref: Textbook of Microbiology, Ananthanarayan and Paniker; 9th edition', 'role': 'assistant'}]