HHV-6B causes ?
High-Yield Explanation
Ans is 'd' i.e., Focal encephalitis . HHV-6 has two variants --> 'A' and 'B'. . HHV- 6 `B' causes i) In children --> Exanthem subitum(roseola infantum or sixth disease) ii) In older age groups -4 Infectious mononucleosis, focal encephalitis iii) In immunodeficient ---> Pneumonia, Disseminated disease