Which one of the following statements is not correct?

The correct answer is D. A law, defining the matters with respect to which the Executive Power of the autonomous State shall extend, can be amended by Parliament by simple majority.

Detailed Explanation:
Why Option D is NOT correct (making it the correct choice for this question):
Under Article 244A(3) of the Constitution of India:

An amendment of a law forming an autonomous State in Assam, insofar as it relates to the legislative powers [clause 2(a)] or the executive powers of the autonomous State [clause 2(b)], CANNOT be passed by a simple majority.

It strictly requires a special majority of not less than two-thirds of the members present and voting in each House of Parliament.

The Fifth Schedule of the Constitution deals with the administration and control of scheduled areas and scheduled tribes in any state except the four states of Assam, Meghalaya, Tripura and Mizoram.

The Fifth Schedule of the Constitution deals with the administration and control of scheduled areas and scheduled tribes in any state except the four states of Assam, Meghalaya, Tripura and Mizoram.

The Fifth Schedule of the Constitution deals with the administration and control of scheduled areas and scheduled tribes in any state except the four states of Assam, Meghalaya, Tripura and Mizoram.