Explanation:

- Option 1: 43rd Amendment Act

- Enacted in 1977.

- Primarily aimed at repealing certain provisions of the 42nd Amendment.

- Option 2: 45th Amendment Act

- Enacted in 1980.

- Related to the reservation of seats for Scheduled Castes, Scheduled Tribes, and Anglo-Indians in the House of the People and the Legislative Assemblies of the States.

- Option 3: 42nd Amendment Act

- Enacted in 1976.

- Often referred to as the "Constitutional Mini-Revolution."

- Conferred jurisdiction to the Supreme Court to transfer cases from one High Court to another.

- Correct Answer: Option 3 is the correct option.

- Option 4: 39th Amendment Act

- Enacted in 1975.

- Pertained primarily to the election of the President, the Vice President, and the Prime Minister.