The correct answer is C. In case of inconsistency among state legislatures.
The Constitution of India, in its Seventh Schedule, lists the subjects on which the Parliament and the State Legislatures have exclusive powers to legislate. However, there are certain situations in which the Parliament can legislate on matters listed in the State List. One such situation is when there is inconsistency between the laws made by the Parliament and the State Legislatures on a particular subject. In such a case, the Parliament’s law will prevail.
The other options are incorrect. Option A is incorrect because the President’s permission is not required for the Parliament to legislate on matters listed in the State List. Option B is incorrect because the Constitution does not require the Parliament to amend the Constitution before legislating on matters listed in the State List. Option D is incorrect because the Parliament does not need the request of two or more States to legislate on matters listed in the State List.