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: Surgery
Exomphalos is a disease involving 
Select and explain. 
A. Umbilicus, B. Cervix, C. Abdominal wall, D. Urinary bladder
C: Abdominal wall
Answer: C: Abdominal wall 
Explanation: None