Which of the following Judicial Doctrines in India is usually applied, when there is a question on the competence of the legislature on making a particular enactment/law under the three lists enumerated in the Seventh Schedule of the Indian Constitution?
1) Doctrine of Basic Structure
2) Doctrine of Eclipse
3) Doctrine of Severability
4) Doctrine of Pith and Substance
4) Doctrine of Pith and Substance