Correct Option
The Election Commission of India is a constitutional body established under Article 324 of the Constitution of India. This article provides for the superintendence, direction, and control of the preparation of electoral rolls and the conduct of elections to Parliament, State Legislatures, and the offices of President and Vice-President. The Chief Election Commissioner and other Election Commissioners are appointed by the President of India.
Incorrect Options
The University Grants Commission (UGC) is a statutory body established in 1956 by an Act of Parliament, the University Grants Commission Act, 1956. It is not constituted under a specific article of the Constitution.
The National Human Rights Commission (NHRC) is a statutory body constituted under the Protection of Human Rights Act, 1993. It is not a constitutional body.
The Central Vigilance Commission (CVC) was initially established in 1964 by an executive resolution of the Government of India. It was later accorded statutory status by the Central Vigilance Commission Act, 2003. It is a statutory body, not a constitutional body.