This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallbladder, Subject name: Surgery
[{'content': 'Extended cholecystectomy includes removal of all except \nSelect and explain. \nA. Segment IV b & V of liver, B. Gall bladder, C. Peri-choledochal lymph node, D. Right hepatic bile duct', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Extended cholecystectomy - En bloc removal of segment IV b & V of liver + gall bladder + lymph node along :- Cystic duct CBD (peri-choledochal lymph node) Peripoal lymph nodes Retro-pancreatic lymph nodes', 'role': 'assistant'}]