Correct option is D
The correct answer is (d) 1988.
· The voting age for the Lok Sabha and the State Legislative Assembly elections was lowered from 21 to 18 years in 1988.
· This change was implemented through the 61st Amendment of the Constitution of India, which was passed by the Parliament in December 1988 and came into effect on March 28, 1989.
· The primary objective of this amendment was to increase the participation of younger citizens in the democratic process, thereby strengthening the democratic framework of the country.