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
[{'content': 'Misoprostol is a - \nSelect and explain. \nA. Prostaglandin E1 analogue, B. Prostaglandin E2 analogue, C. Prostaglandin antagonist, D. Antiprogestin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Prostaglandin El analogue Misoprostol is a stable analogue of Prostaglandin E1 - KDT", 'role': 'assistant'}]