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': '20 yrs 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: Androgen secreting ovarian neoplasm usually present with rapidly developing hirsutism, amenorrhea, and virilisation. A serum testosterone level of more than 200 ng/dl should be considered evidence of ovarian tumor until proven otherwise. Ref: Shaw's Textbook of Gynaecology, 17th Edition, Page 77 ; Current Obs and Gynae Diagnosis and Treatment, 9th Edition, Page 1005", 'role': 'assistant'}]