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
Misoprostol, a prostaglandin analogue is useful as : 
Select and explain. 
A. Uterine relaxant, B. Anti–ulcer, C. Bronchodilator, D. Vasodilator
B: Anti–ulcer
Answer: B: Anti–ulcer 
Explanation: None