Which of the following statements are correct regarding the Constitution (First Amendment) Act, 1951?
1. Ninth Schedule was added through this act to protect the land reforms from the judicial review.
2. It empowered the State Governments to make special provisions for the advancement of socially and educationally backward classes.
3. It authorized the Government to nationalize any trade.
4. It provided for the establishment of a common High Court for two or more states.
Select the correct answer using the codes given below: