This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Failure of closure of posterior neupore causes? 
Select and explain. 
A. Anencephally, B. Spina bifida, C. Gastroschisis, D. Omphalocele
B: Spina bifida
Answer: B: Spina bifida 
Explanation: Caudal or posterior neuropore closes by 28th day of intrauterine life Failure of closure leads to spina bifida