The correct option is B Rapid combustion
Rapid combustion is defined as a combustion that takes place quickly and continuously without taking much time.
When some combustible substances catch fire on their own without any apparent cause is defined as Spontaneous combustion.
When a combustible substance burns very rapidly with the evolution of a large amount of heat, light, sound, and energy the that combustion is defined as Explosion.
The combustion reactions which take place slowly and give less amount of heat are termed as slow combustion reactions.