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': 'Follistatin \nSelect and explain. \nA. Decreased gonadotrope function, B. Increases gonadotrope function, C. Prevents interaction of activin with receptor, D. Stimulates FSH β gene expression', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Follistatin is gonadal peptide, that suppresses FSH\xa0β gene expression thereby preventing interaction of activin with its receptor.', 'role': 'assistant'}]