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
Drug not used in the treatment of H. pylori is - 
Select and explain. 
A. Cisapride, B. Clarithromycin, C. Metronidazole, D. Omeprazole
A: Cisapride
Answer: A: Cisapride 
Explanation: Ans. is 'a' i.e., Cisapride