Explanation: It should be noted at the outset that several original features of the Constitution (as adopted in 1949) have undergone a substantial change, on account of several amendments, particularly 7th, 42nd, 44th, 73rd, 74th, 97th and 101^st Amendments.

In fact, the 42nd Amendment Act (1976) is known as ‘Mini-Constitution’ due to the important and large number of changes made by it in various parts of the Constitution.

Source: Laxmikanth