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': 'Which is the most common micro-organism known to cause tropical pyomisitis ? \nSelect and explain. \nA. Streptococcus viridans, B. Staphylococcus albus, C. Klebsiella pneumoniae, D. Staphylococcus aureus', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Staphylococcus aureus", 'role': 'assistant'}]