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': 'Mycoplasma pneumonia is characterised by all except- \nSelect and explain. \nA. Diagnosed by serum cold antibody, B. Treatment is erythromycin, C. Cannot be cultured from sputum, D. Raised ESR', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]