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': 'Closure of neural tube begin from \nSelect and explain. \nA. Cervical region, B. Cephalic, C. Podalic, D. Lumbar region', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Closure of neural tube at cervical region.\nCronial neuropore closes by 25th day.\nCaudal neuropore closes by 28th\xa0day.', 'role': 'assistant'}]