Which one of the following is an example of low explosive ?

Explosives are generally classified into two categories: low explosives and high explosives. Low explosives (also called deflagrating explosives) undergo a rapid burning process called deflagration, where the reaction moves through the material at subsonic speeds. Gunpowder (black powder) is the most common example of a low explosive, primarily used as a propellant in ammunition and fireworks.

In contrast, high explosives undergo detonation, where the chemical reaction propagates at supersonic speeds, creating a powerful shockwave. TNT (Trinitrotoluene), Dynamite, and Gelatine (specifically blasting gelatine) are all high explosives used for shattering rock or military applications. Low explosives are preferred for propelling projectiles because they provide a sustained push rather than an instantaneous shattering blast.