Indian Polity · Polity

Consider the following statements about the 'Basic Structure' doctrine of the Constitution: I. The doctrine of the 'Basic Structure' was formally incorporated into the Constitution of India through the 44th Constitutional Amendment Act. II. Presently, the Parliament under Article 368 can amend any part of the Constitution provided it does not alter or destroy its 'Basic Structure'. III. The limited amending power of the Parliament is itself considered an element of the 'Basic Structure' of the Constitution. IV. The Supreme Court explicitly declared the mandate to build a welfare state as part of the basic structure for the first time in the Kumar Padma Prasad case (1992). Which of the statements given above are correct?