This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
[{'content': 'Marker for granulosa cell tumor; \nSelect and explain. \nA. CA 19-9, B. CA 50, C. Inhibin, D. Teratoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p> - inhibin B is a peptide growth factor secreted by granulosa cells. - it is a measure of diminished ovarian reserve. - inhibin B is elevated in granulosa cell tumors. Reference : textbook of gynaecology Sheila balakrishnan, 2nd edition, pg no: 135 <\\p>', 'role': 'assistant'}]