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': 'Notochord develops in - \nSelect and explain. \nA. 3rd week, B. 3rd month, C. 6th month, D. 10th month', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]