Choledochal cyst

Q What is the management of choledochal cyst (bile duct cyst) adherent to portal vein?
a) Excision and Roux en y hepaticojejunostomy
b) Internal drainage into roux en y jejunal limb
c) Hepatic lobectomy
d) The internal lining of the cyst can be excised, leaving the  external portion of the cyst wall intact.