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: Gynaecology & Obstetrics
[{'content': 'Elevated androgens in PCOD \nSelect and explain. \nA. Convert terminal hair to vellus hair irreversibly., B. Convert vellus hair to terminal hair irreversibly., C. Reversible conversion of vellus hair to terminal hair., D. Reversible conversion of terminal hair to vellus hair.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Elevated androgen convert vellus hair into coarse terminal hair. This conversion is irreversible.', 'role': 'assistant'}]