In all of the following diseases chronic carriers are found except:: (A) Measles, (B) Typhoid, (C) Hepatitis B, (D) Gonorrhoea
Answer is A. Ans. is 'a' i.e. Measles In measles the only source of infection is a case of measles. Carriers are not known to occur.For more see Q no. 31 of Dec 1998.