The Correct Answer is Option 4 i.e Neither 1 nor 2. Key Points Both the SC and HCs have the jurisdiction to question the validity of a constitutional amendment or a central law. Though the 42nd Amendment Act of 1976 curtailed the judicial review power of high courts and debarred the high courts from considering the constitutional validity of any central law. However, the 43rd Amendment Act of 1978 restored the original position of the high courts and now the High Court shall have the jurisdiction to declare any central law to be constitutionally invalid. High Courts have the jurisdiction to declare any central law to be constitutionally invalid. As the Supreme Court is the guardian of the Constitution and so any constitutional amendment that is against the basic structure of the constitution which was derived in Keshava Nanda Bharti case, 1973 can be nullified by the Supreme Court.