The correct answer is D. Gun powder.
Gunpowder is a black or brownish-gray powder consisting of potassium nitrate (saltpeter), charcoal, and sulfur. It is used as a propellant in firearms and as an explosive in blasting.
Glass is an amorphous solid, that is, a solid that does not have a regular crystal structure. It is made by melting silica sand (silicon dioxide) and other materials, such as soda ash and lime, and then cooling it rapidly.
Cement is a binding agent that is used to hold together aggregates (such as sand and gravel) to form concrete. It is made by grinding limestone and clay into a powder and then heating it to a high temperature.
Paint is a liquid or semi-liquid material that is applied to a surface to protect it, decorate it, or provide a specific functional effect. It is made from a variety of materials, including pigments, binders, solvents, and additives.