<prompt> Blood group most commonly associated with gastric carcinoma is?Blood Group OBlood group ABlood group ABBlood group B  <response>: Ans. is b i.e., Blood Group A Risk factors for gastric carcinomaA. Environmental factors: H. Pylori infection, dietary factors nitritesnitrate, smoked and salted foods, lack of fresh fruitsvegetables, deficiency of vitamin C E, cigarette smoking, and low socioeconomic status.B. Host factors: Chronic gastritis causing hypochlorhydria or intestinal metaplasia, partial gastrectomy, gastric adenoma, Barrett s esophagus, and Menetrier disease.C. Intestinal metaplasia is the most significant precursor lesion for Gastric cancer.D. Genetic factors: Blood group A, Hereditary nonpolyposis colon cancer syndrome HNPCC and Familial gastric cancer syndrome E-cadherin mutation.Decreased risk of stomch cancer is seen with Vitamin C 8c E Diet high in green leafy vegetables and citrus fruits Aspirin Beta - Carotene 