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': 'A 20-year-old young girl, presents with history of rapidly developing hirsutism and amenorrhea with change in voice. To establish a diagnosis you would like to proceed with which of the following tests in blood: \nSelect and explain. \nA. 17 OH progesterone, B. DHEA, C. Testosterone, D. LH + FSH estimation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]