Explanation:

1, 3 and4

Constitution does not define what secularism is and who is secular. In fact, till date even judiciary has not been able to define secularism. Thus there is a need to initiate a national debate to ascertain what should constitute the term ‘secular’ and a political and social consensus has to be achieved.

However, despite its being very subjective and vague, secularism is a part of the basic structure of the Constitution, thanks to Supreme Court. In multiple constitutional cases especially the S.R.Bommai case, Supreme Court has ruled that secularism forms the basic structure of the Indian Constitution. In the Ayodhya case also, the Court opined that the secular nature of India would form the basic structure of our Constitution, even if it hadn’t been specifically mentioned in the Constitution. However, despite all this, there is a need to define what secularism means to India and Indians, and how it translates in implementation.