58.
The answer is: B
Explanation
The correct option is B: Art.256.
Article 256 of the Constitution of India deals with the obligation of states and the union to ensure compliance with the laws made by Parliament and any existing laws that apply in the state. It also empowers the union to give directions to the state as may appear to be necessary for that purpose.
This article is part of Part XI of the Constitution, which deals with the administrative relations between the centre and the state. It is intended to maintain the unity and integrity of the nation and to ensure the implementation of parliamentary laws throughout the country.