Surgery Stomach & Duodenum 321cb04f Commonest site of peptic ulcer is: A 1st part of duodenum B 2nd part of duodenum C Distal 1/3rd of stomach D Pylorus of the stomach High-Yield Explanation 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