<prompt> Which of the following is a risk factor for development of gastric carcinoma?Blood group OIntestinal metaplasia type IIIDuodenal ulcerAll of the above  <response>: Blood group A, not O was considered as the risk factor for Gastric carcinoma but blood group A is also not considered as risk factor according to standard books. About duodenal ulcers standard books writes Although once considered a premalignant conditions, it is likely that older literatures was confounded by mistakenly labeling inadequately biopsied ulcers and healing ulcers as benign when in fact they were malignant to begin with. Intestinal metaplasia is a premalignant condition and among intestinal metaplasia , intestinal metaplasia type III is more likely to progress to gastric cancer. Ref: Schwaz 9e, Page 927; Maingots 10e, Page 1006. 