<prompt> Only simple cholecystectomy is adequate in which stage of gallbladder cancerStage IAStage IBStage IIIStage IV  <response>: Answer- A. Stage IAAccording to TNM staging, Simple cholecystectomy is done for T1a which is included in stage-I.T1a- simple cholecystectomyT1b, II III- Extended cholecystectomyIV- Palliative treatment 