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': 'Streptomyces of granules in mycetoma caused by Actinomadura pelletieri \nSelect and explain. \nA. Red, B. Yellow, C. Black, D. Brown', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Brown to black- Madurella mycetomatis, madurella grisea, exophiala jeanselmei.\nWhite to yellow- Nocardia asteroides, Nocardia brasiliensis, Actinomadura madurae, Streptomyces somaliensis, Scedosporium apiospermum.', 'role': 'assistant'}]