<prompt> Most appropriate treatment option for the carcinoma gallbladder with invasion of perimuscular connective tissue, diagnosed after laparoscopic cholecystectomy:Resection of segment IVb V of liverResection of segment IVb V of liver with nodal clearanceWedge excision of liver with lymphadenectomyWedge excision of liver with lymphadenectomy and po site excision  <response>: 8TH AJCC 2017 TNM classificationT1A - Involvement of lamina propriaT1B - Involvement of muscularis propriaT2A - Invasion of perimuscular connective tissue towards peritoneal side without extension to serosaT2B - Invasion of perimuscular connective tissue towards hepatic side without direct hepatic invasionT3 - Serosal perforation or direct hepatic invasion or involvement of single extrahepatic organT4 - Involvement of poal vein or hepatic aery or two or more extrahepatic organN1 - Metastasis to 1 - 3 lymph nodesN2 - Metastasis to 4 or more lymph nodesM0 - No distant metastasisM1 - Distant metastasis Staging Treatment ___ IA - T1a Lap cholecystectomyIB - T1b___IIA - T2a IIB - T2b Extended cholecystectomyIIIA - T3IIIB - T1-3 N1___ IVA - T4 N0-1 Extended cholecystectomy Extended R hepatectomy ___ IVB - T any N2 Palliation we give chemotherapy - T any N any M1 ___Extended cholecystectomy- Enbloc removal of segment IV b V of liver gall bladder lymph node along Cystic duct CBD peri-choledochal lymph node Peripoal Retro-pancreatic 