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': 'The following is true for Mycoplasmas except - \nSelect and explain. \nA. Multiply by binary fission., B. Are sensitive to beta-lactam group of drugs., C. Can grow in cell free media., D. Require sterols for their growth', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]