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': '"L-form" phenomenon is most likely to occur in: \nSelect and explain. \nA. Mycoplasma, B. Mycobacteria, C. Proteus, D. Pasteurella', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mycoplasma', 'role': 'assistant'}]