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
A farmer presents with subcutaneous swelling, multiple discharging sinuses in the leg. Not responding to antibiotics - diagnosis 
Select and explain. 
A. Madurella, B. Nocardia, C. Actinomadura, D. None of the above
A: Madurella
Answer: A: Madurella 
Explanation: Not responding to antibiotics; Eumycetoma - Madurella (m/c).