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
Prostaglandin useful for the prevention of duodenal ulcer is : 
Select and explain. 
A. Dinoprost, B. Misoprostol, C. Alprostadil, D. Carboprost
B: Misoprostol
Answer: B: Misoprostol 
Explanation: None