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
Anti-Helicobacter pylori drugs are all of the following except: March 2010 
Select and explain. 
A. Clarithromycin, B. Amoxicillin, C. Metronidazole, D. Tetracycline
D: Tetracycline
Answer: D: Tetracycline 
Explanation: Ans. D: Tetracycline