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 of the following is not seen in HIV patient with CD4 countless than 100/ml, who has non productive cough? \nSelect and explain. \nA. Mycobacterium tuberculosis, B. Pneumocystis carinii, C. Mycoplasma pneumoniae, D. Cryptococcal infection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c. Mycoplasma pneumoniae', 'role': 'assistant'}]