<prompt> In which of the following tumors alpha fetoprotein AFP is elevated?ChoriocarcinomaNeuroblastomaHepatocellular carcinomaSeminoma  <response>: Serum elevations of alkaline phosphatase and alpha fetoprotein are common. An abnormal type of prothrombin, des-gamma-carboxy prothrombin, is made and correlates with AFP elevations. 