Exp) Option d is the correct answer.

According to the Article-49 of Directive Principles of State Policy enumerated in Part IV of the constitution deals with the Protection of monuments and places and objects of national importance. It shall be the obligation of the State to protect every monument or place or object of artistic or historic interests, declared by or under law made by Parliament to be of national importance, from spoliation, disfigurement, destruction, removal, disposal or export, as the case may be. Later to provide it with legislative backing The Ancient Monuments and Archaeological Sites and Remains Act, 1958 was enacted which envisages the provisions of Article-49.