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
What is the surgery of choice for diffuse type of choledochal cyst 
Select and explain. 
A. Resection and repair, B. Rouxeny hepaticojejunostomy, C. Liver transplant, D. Observation
B: Rouxeny hepaticojejunostomy
Answer: B: Rouxeny hepaticojejunostomy 
Explanation: Diffuse dilatation of the CBD is treated with resection and roux en y hepaticojejunostomy