Indian Polity · Polity

With reference to the Doctrine of Basic Structure in the Indian Constitution, consider the following statements: 1. It limits parliamentary sovereignty to protect constitutional supremacy. 2. Core features falling within the basic structure cannot be amended under the amending power of Parliament. 3. As per the Kesavananda Bharati case, Judicial Review is an essential part of the Basic Structure doctrine. How many of the above statements are correct?