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
Closure of neural tube begins at which of the following levels: 
Select and explain. 
A. Cervical region, B. Thoracic region, C. Cephalic end, D. Caudal end
A: Cervical region
Answer: A: Cervical region 
Explanation: 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.