The last case of small pox was reported in the world
High-Yield Explanation
Ans. is 'a' i.e., 1977 * It is the only infectious disease which has been eradicated globally. The world's last case occured in Somalia on 26 October 1977. The WHO declared on 8 may 1980 that smallpox had been eradicated.* In April 1977, India was declared smallpox free. The last idiginous case in India occured on 17 may 1975 in Bihar and India's last known case of smallpox was an importation from Bangladesh, which occured on 24 May 1975.