The correct answer is Sandstone Tiles.

Under the ODOP initiative, Madhya Pradesh has identified Sandstone Tiles as the ODOP product for Gwalior district. Natural sandstone is found abundantly in and around Gwalior, and many manufacturing units in the Stone Park, Old Cantonment area produce stone tiles and polished stone products for domestic and export markets including Gulf countries.

Other options: Cut Stone is the ODOP product of Katni district. Wooden Furniture belongs to Chhatarpur. Carpet (Panja Dari) is associated with other districts, not Gwalior.