<prompt> Commonest site of peptic ulcer is:1st part of duodenum2nd part of duodenumDistal 13rd of stomachPylorus of the stomach  <response>: Ans. a 1st part of duodenumRef: Sabiston 19th Edition, Page 1199 Most common location 1st part of duodenum Most common location in stomach is incisura angularis 