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': 'A farmer presents with subcutaneous swelling, multiple discharging sinuses in the leg. Not responding to antibiotics - diagnosis \nSelect and explain. \nA. Madurella, B. Nocardia, C. Actinomadura, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Not responding to antibiotics; Eumycetoma - Madurella (m/c).', 'role': 'assistant'}]