<prompt> Which of the following is calcivirus?HEVHBVHCVHAV  <response>: Ans. a HEV According to Ananthanarayan 9e, p 550 HEV has been classified in genus hepesvirus under family calciviridae. But according to Harrison 18e 2543 HEV although resembling calicivirus is sufficiently distinct from any known agent to merit a new classification of its own as a unique genus; Hepevirus with in the family Hepeviridae. 