Anatomy According to Bismuth classification, type IV Cholangiocarcinoma involves A Common hepatic duct B Bifurcation only C Bifurcation and bilateral secondary intrahepatic ducts D Bifurcation and unilateral secondary intrahepatic ducts 💡 Explanation According to Bismuth classification, type IV Cholangiocarcinoma involves ✓ Correct Answer: C. Bifurcation and bilateral secondary intrahepatic ducts