Ans. is 'a' i.e., Omental bursa BDC writes - "The posterior surface of the stomach is related to structures forming the stomach bed, all of which are separated from the stomach by the cavity of the lesser sac." Thus an ulcer on the posterior wall of stomach would perforate into the lesser sac. Also remember Most perforated ulcers are located on the anterior wall. The moality rate for perforated gastric ulcer is higher than that for duodenal ulcer. This is generally due to the gastric ulcer patients' more advanced age, increased medical comorbidities, delay in seeking medical attention, and the larger size of gastric ulcers.