<prompt> Not a specific tumor marker is?CD 99HMB45b- globulinCEA  <response>: Ans is d i.e., CEA o Carcinoembryonic antigen CEA is used as tumor marker for colorectal cancer major use, lung cancer, breast cancer and ovarian cancer. It is alsoincreased in non-neoplastic conditions like alcoholic cirrhosis, hepatitis, IBD CD, UC, smoking and pancreatitis.o CEA lacks sensitivity as well as specificity, hence cannot be used to confirm the diagnosis.About other optionso CD 99 - specific marker for Ewings sarcomao HMB 45 - specific marker for malignant melanomao b- globulin - specific marker for multiple myeloma 