This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Alprostadil is used for \nSelect and explain. \nA. Erectile dysfunction, B. Pulmonary hypeension, C. PDA, D. Critical limb ischemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref: HL Sharma 3rd ed pg no: 370 alprostadil - PGE1 analog used for erectile dysfunction -produces vasodilatation if it is used for PDA, It could lead to ductus fragility and rupture', 'role': 'assistant'}]