This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Histamine, 5-HT and PGs, Subject name: Pharmacology
[{'content': 'Which of the following drug is given for pulmonary hypeension? \nSelect and explain. \nA. Carboprost, B. Mispoprostol, C. Indomethacin, D. Bosentan', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Endothelin Antagonists (DOC) - Bosentan - Ambresenton - Macisentan If these are not effective then drugs used are Phosphodiesterase inhibitors like sildenafil and tadalafil. Prostaglandins - Iloprost (Not given orally) Selexipag (Prostacyclin Agonist) - PGI2 Agonist - Given orally', 'role': 'assistant'}]