Which of the following articles of the Constitution of India was invoked by the Kerala government to file a petition against the Citizenship (Amendment) Act (CAA) in the Supreme Court on 14 January 2020?

Article 131

The correct answer is Option 1- Article 131

The Kerala government invoked Article 131 of the Constitution of India to file a petition against the Citizenship (Amendment) Act (CAA) in the Supreme Court.

Article 131 deals with the original jurisdiction of the Supreme Court. It empowers certain parties, including states, to directly initiate legal proceedings before the Supreme Court to address disputes involving the central government or other states.
The Citizenship Amendment Act (CAA) itself was passed by the Indian Parliament on December 11, 2019. However, it wasn't fully implemented until much later.

Here's a breakdown of the CAA's implementation timeline:

December 2019: Passed by Parliament.
January 10, 2020: Originally announced to come into force.
March 11, 2024: The CAA rules, necessary for implementation, were finally notified by the government.