This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Introduction and gametogenesis., Subject name: Anatomy
[{'content': 'Primary oocyte remains arrested in diplotene phase because of ? \nSelect and explain. \nA. oocyte maturation inhibitor, B. oocyte maturation stimulator, C. acetyl choline, D. oestrogen', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Oocyte maturation inhibitor acts by increasing cAMP . LH surge at pubey reduces cAMP so removing the arrest stage of oocyte .', 'role': 'assistant'}]