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': 'Hirsutism is caused by which drug : \nSelect and explain. \nA. Minoxidil, B. Dactinomycin, C. Cycloserine, D. Valsartan', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Minoxidil is a potassium channel opener, useful as an antihypertensive drug. It can cause hirsutism in females and is used for the treatment of alopecia in males.', 'role': 'assistant'}]