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': 'Longest phase of meiosis is: \nSelect and explain. \nA. Prophase I, B. Prometaphase, C. Metaphase I, D. Anaphase I', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]