<prompt> Which of the following hepatitis has worst prognosis?HBV HDV co-infectionHDV super infection on HBVHBV aloneHDV alone  <response>: ANSWER: B HDV super infection on HBVREF: Harrisons 17th ed chapter 300Though prognosis of HDV with HBV is a bad prognosis, however prognosis of super infection is worse than coinfection. 