<prompt> Tumors associated with infective etiology are all exceptNasopharyngeal caHepatocellular caNon-small cell carcinoma lungGastric ca  <response>: Nasopharyngeal carcinoma - Epstein-Barr virus Hepatocellular carcinoma - Hepatitis B virus Gastric carcinoma - H.pylori gram positive spiral shaped bacteriaReference : page 222 and 224 Textbook of pathology Harshmohan 6th edition 