Anatomy According to Alonso-Lej classification, type IVb is A Both extrahepatic and intrahepatic duct dilation B Extrahepatic duct dilation C Intrahepatic duct dilation D Subhepatic duct dilation 💡 Explanation According to Alonso-Lej classification, type IVb is ✓ Correct Answer: B. Extrahepatic duct dilation