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: Pharmacology
[{'content': 'The following organisms are known to develop resistance to Penicillin except : \nSelect and explain. \nA. Staphylococcus, B. Streptococcus, C. Pneumococcus, D. Treponema', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]