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': 'Diene’s method is used for : \nSelect and explain. \nA. Mycoplasma, B. Chlamydiae, C. Plague, D. Diptheria', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Colonies of mycoplasma are typically biphasic, with a fried egg appearance.\xa0\n• Colonies are best studied after staining by Dienes method .', 'role': 'assistant'}]