This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'Treatment for male pattern alopecia includes \nSelect and explain. \nA. Finasteride, B. Potassium channel blocker, C. Fulvestrant, D. Dexamethasone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Finasteride and dutasteride are 5 alpha reductase inhibitors; inhibit the formation of Dihydrotestosterone. So they are used in alopecia and also in BPH. Minoxidil also used in treatment. Fulvestrant is a SERD selective estrogen down regulator Ref: KD tripathi , 8th ed', 'role': 'assistant'}]