This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'False regarding CA GB \nSelect and explain. \nA. T1a: simple cholecystectomy, B. T1b: Extended cholecystectomy, C. T1a: Extended cholecystectomy if carcinoma in neck of gallbladder, D. Excision of po sites improves survival', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Treatment of carcinoma Gallbladder Gallbladder cancer: Incidental pathological finding after laparoscopic cholecystectomy T1a with negative cystic duct margin : No fuher therapy T1a with postive cystic duct margin : Reresection of cystic duct or CBD to negative margin T1b, T2, T3 tumor with no evidence of metastasis : Reresection, extended cholecystectomy (possible CBD or extended hepatic resection) T4: Extended cholecystectomy with extended right hepatectomy N2 or M1 disease : Clinical trial (Chemoradiation or chemotherapy) in good performance status. Laparoscopic trocar site scars are excised for staging purpose to identify M1 disease than for any potential therapeutic benefit Ref: Sabiston 20th edition Pgno : 1512-1514', 'role': 'assistant'}]