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': 'Tinea Nigra is caused by \nSelect and explain. \nA. Hortaea werneckii, B. Piedrae hortae, C. T. rubrum, D. Microsporum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tinea nigra is characterised by painless, black, non scaly patches over palms & sole, caused by Hortaea werneckii.', 'role': 'assistant'}]