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
Failure of migration of neural crest cells is seen in? 
Select and explain. 
A. Albinism, B. Congenital megacolon, C. Odontomes, D. Adrenal tumour
B: Congenital megacolon
Answer: B: Congenital megacolon 
Explanation: B i.e. Congenital Megacolon