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': 'Which organism cannot be cultured -a) Klebsiella rhinoscleromatisb) Klebsiella ozaenaec) Klebsiella granulomatisd) Pneumocystis jirovecie) Rhinosporidium seeberi \nSelect and explain. \nA. de, B. bc, C. cd, D. bd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: "The life cycle of pneumocystis probably involves sexual and asexual reproduction, although definitive proof\xa0awaits the development of a reliable culture system".\n─ Harrison\n"Rhinosporidium seeberi has not been cultivated in media". \n─ Ananthnarayan.', 'role': 'assistant'}]