Surgery Type 4 Bismuth classification for cholangiocarcinoma: A Common hepatic duct B Bifurcation only C Bifurcation and bilateral secondary intrahepatic ducts D Bifurcation and unilateral secondary intrahepatic ducts 💡 Explanation Type 4 Bismuth classification for cholangiocarcinoma: ✓ Correct Answer: C. Bifurcation and bilateral secondary intrahepatic ducts