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
The antiulcer agent detaches and kills H. Pylori organism and prevent relapses is 
Select and explain. 
A. Colloidal Bismuth, B. Pirenzipine, C. Misoprostol, D. Sucralfate
A: Colloidal Bismuth
Answer: A: Colloidal Bismuth 
Explanation: None