The correct answer is D. Nitro chloroform.
TNT, TNG, and cyclotrimethylene trinitrate are all explosives. TNT is trinitrotoluene, a yellow, crystalline solid that is used in explosives, including landmines, artillery shells, and bombs. TNG is trinitroglycerin, a colorless, oily liquid that is used in explosives, including dynamite and rocket propellants. Cyclotrimethylene trinitrate is also known as RDX, cyclonite, or hexogen, a white, crystalline solid that is used in explosives, including plastic explosives and rocket propellants.
Nitro chloroform is a colorless, flammable liquid that is used as a solvent and a refrigerant. It is not an explosive.