Explanation: The Indian Constitution adopts universal adult franchise as a basis of elections to the Lok Sabha and the state legislative assemblies.

• Every citizen who is not less than 18 years of age has a right to vote without any discrimination of caste, race, religion, sex, literacy, wealth and so on.
• The voting age was reduced to 18 years from 21 years in 1989 by the 61st Constitutional Amendment Act of 1988.

Source: Laxmikanth’s Polity