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': 'Growth on a cell-free artificial solid medium is possible for following except - \nSelect and explain. \nA. Ureaplasma urealyticum, B. Mycoplasma pneumoniae, C. C and L form of proteus vulgaris, D. Chlamydia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]