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
Which of the following is not seen in HIV patient with CD4 countless than 100/ml, who has non productive cough? 
Select and explain. 
A. Mycobacterium tuberculosis, B. Pneumocystis carinii, C. Mycoplasma pneumoniae, D. Cryptococcal infection
C: Mycoplasma pneumoniae
Answer: C: Mycoplasma pneumoniae 
Explanation: Ans. c. Mycoplasma pneumoniae