Disease under international surveillance by WHO-

Ans. is 'b' i.e., Relapsing fever * At the international level, the following diseases are notifiable to WHO in Geneva under International health regulation -i) Choleraii) Plagueiii) Yellow fever} -These are notifiable diseases as well as under surveillance* Few other diseases are also subjected to international surveillance -i) Lause - born typhus feveriii) Poliov) Malariavn) Salmonellosisii) Relapsing feveriv) Influenzavi) Rabies