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: Pediatrics
Banana sign seen in the foetal brain suggests – 
Select and explain. 
A. Renal agenesis, B. Encephalocele, C. Spina bifida, D. Porencephaly
C: Spina bifida
Answer: C: Spina bifida 
Explanation: None