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
Which of the following drug used in peptic ulcer can result in gynaecomastia 
Select and explain. 
A. Sucralfate, B. Cimetidine, C. Pirenzepine, D. Rabeprazole
B: Cimetidine
Answer: B: Cimetidine 
Explanation: Cimetidine inhibits metabolism of estrogen and can cause gynaecomastia.