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': 'Ureaplasma is naturally resistant to - \nSelect and explain. \nA. Erythromycin, B. Tetracycline, C. Chloramphenicol, D. Cephalosporins', 'role': 'user'}, {'content': 'Answer: D \nExplanation: As there is lack of peptidoglycan layer, hence Ureoplasma is naturally resistant to all beta lactams', 'role': 'assistant'}]