The correct answer is: a) Seventh Schedule.
The Seventh Schedule of the Indian Constitution lists the powers of the Union and the States. It is divided into three lists: the Union List, the State List, and the Concurrent List. The Union List contains subjects that are of national importance and are to be dealt with by the Union Government. The State List contains subjects that are of local importance and are to be dealt with by the State Governments. The Concurrent List contains subjects that are of common importance to both the Union and the State Governments.
The Seventh Schedule is important because it provides a clear division of powers between the Union and the States. This helps to ensure that there is no conflict between the two levels of government. It also helps to ensure that the Union and the States are able to function effectively.
The other options are incorrect because they do not deal with the division of powers between the Union and the States. The Fundamental Rights are the basic rights that are guaranteed to all citizens of India. The Preamble is the introductory statement of the Indian Constitution. The Directive Principles are principles that are to be followed by the State Governments in making laws.