This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Embryology 2, Subject name: Anatomy
[{'content': 'Closure of neural tube begins at which of the following levels: \nSelect and explain. \nA. Cervical region, B. Thoracic region, C. Cephalic end, D. Caudal end', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Closure of neural groove into neural tube begins in cervical region(5th somite) and proceeds cranially and caudally in a bidirectional manner. But according to latest concept it has been postulated that closure begins at multiple sites and proceeds simultaneously.', 'role': 'assistant'}]