Biliary fistula in Hydatid cyst liver

Q) Which is not true in terms of biliary fistula in  hydatid cyst liver

a) Cyst diameter more than 10 cm is a predictor of intrabiliary rupture

b) Minor communications are revealed by post op bile leak

c) Major biliary communication is fistula more than 5 mm or communication in the bile duct

d) Major biliary communication is seen in 15-20%