A:
37th Constitutional Amendment 1975
B:
61st Constitutional Amendment 1988
C:
56th Constitutional Amendment 1987
D:
46th Constitutional Amendment 1982
Explanation
The correct answer is B: 61st Constitutional Amendment 1988. This amendment was passed by the Parliament of India in 1988, which lowered the minimum voting age from 21 to 18 years for both national and state elections. The amendment was made to reflect the fact that young people in the age group of 18-21 years were deemed to be mature enough to exercise their right to vote. The amendment was a major step towards democratization and youth empowerment in India.