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
Treatment of congenital cyst of head of pancreas - 
Select and explain. 
A. Total excision, B. Partial excision, C. Marsupialization, D. Observe and medical treatment
A: Total excision
Answer: A: Total excision 
Explanation: None