Virus which has more than one serotypes ?: (A) Measles, (B) Mumps, (C) Rubella, (D) Influenza
Answer is C. Ans. is 'd' i.e., Influenza Influenza virus is an enveloped RNA virus containing 8 pieces (8 segments) of single stranded RNA. There are three viral subtypes : (i) Type A (causes all pandemics and most epidemics); (ii) Type B; and (iii) Type C (not circulating currently).