<prompt> Most common type of choledochal cyst?Type 1Type 2Type 3Type 6  <response>: Choledochal cysts are congenital cystic dilatation of biliary tree.The most common type of choledochal cyst is Type l Todani modification of Alonso-Lej classification,i.e.,Dilatation of extrahepatic biliary treeapprox.75.It can be cysticType la,focal segmentalsaccularType lb or fusiformType lc.Choledochal cyst presents with the triad of right upper quadrant pain,jaundice,palpable abdominal mass. Reference:SRBs manual of surgery,5th edition,page no:637. 