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
Therapeutic uses of prostaglandin E1 include all of the following except 
Select and explain. 
A. Medical termination of pregnancy, B. Impotance, C. Primary pulmonary hypeension, D. Maintenance of patent ductus aeriosus
C: Primary pulmonary hypeension
Answer: C: Primary pulmonary hypeension 
Explanation: Prostaglandin I2 analogue (like epoprostenol and treprostinil) are used for the treatment of Pulmonary hypeension. prostaglandin E1 analogue are used for first trimester aboion (Misoprostol), impotence (alprostadil) and maintenance of patency of ductus aeriosus patency of ductus aeriosus (alprostadil). Refer kDT 6/e p181