A 35-yr-old man had burning epigastric pain and dyspepsia which was relieved after meals. He had history of joint pain for which NSAIDs were prescribed. Upper GI endoscopy shows multiple gastric ulcers with punched out appearance and clear margins. a.What is the possible diagnosis? (1) b.Describe in brief about its etiopathogenesis and complications. (5+2) c.Draw a labelled microscopic diagram of the above entity. (4)