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: Pharmacology
All true except ? 
Select and explain. 
A. Cotrimoxazole is effective against P carinii, B. Clarithromycin effective against mycobacterium avium complex, C. Doxycycline is effective against legionella, D. Ceftriaxone is effective against gonorrhea
C: Doxycycline is effective against legionella
Answer: C: Doxycycline is effective against legionella 
Explanation: Ans. is 'c' i.e., Doxycycline is effective against legionella