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: Anatomy
[{'content': 'After first meiotic division, the primary oocyte remains arrested in - \nSelect and explain. \nA. Diplotene stage, B. Pachytene stage, C. Metaphase, D. Telophase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]