This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
Misoprostol is a? 
Select and explain. 
A. Prostaglandin E1 analogue, B. Prostaglandin E2 analogue, C. Prostaglandin antagonist, D. Antiprogestin
A: Prostaglandin E1 analogue
Answer: A: Prostaglandin E1 analogue 
Explanation: Misoprostol -PGE1 analog used for aboion-200mg.BD/orally. along with mifepristone to induce aboion in 1st few wks of pregnancy. Ulcer protective agent-200mg orally QID Ref: KD Tripathi 8th ed.