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 tumor
B: Congenital megacolon
Answer: B: Congenital megacolon 
Explanation: Congenital megacolon (nirschsprung tiscase) due to failure of migration of neural crest to distal part of the tube so absence of para sympathetic myenteric acerbach's ganglia. Diseased segment is construction and the segmanr proximal is dilated due to faxical retention.