<prompt> Sphincterectomy of sphincter of oddi is performed at3 Oclock position6 O clock position9 Oclock position11 Oclock position  <response>: Transduodenal Sphincterectomy This cut is made Superiorly at 11 Oclock position for 4 to 5 mm. The sphincter is incised at the 11 Oclock position to avoid injury to the pancreatic duct Ref: Sabiston 20th edition Pgno :1496 