This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Laparoscopic cholecystectomy done in a patient with cholelithiasis. Pathology report shows adenocarcinoma with invasion of muscular layer. CT was normal. Further t/t is 
Select and explain. 
A. Wait and regular follow up, B. Wedge hepatic resection with lymph node dissection, C. Excise all port sites, D. Radiotherapy
B: Wedge hepatic resection with lymph node dissection
Answer: B: Wedge hepatic resection with lymph node dissection 
Explanation: HEPATIC RESECTION  (Indications)  

Parasitic and non-parasitic cysts.  
Benign and primary malignant tumours of the liver.   
Secondary tumour that involves by direct extension  like from carcinoma of gallbladder or limited  secondaries from carcinoma colon/carcinoids.
Trauma to liver.Removal of small portion of liver either within the  segment or traversing segments is called as wedge  resection of the liver.