Which statement best explains the spontaneous combustion?

Options

A. It is the ability of materials to burn with the help of some source of heat like flame or spark.
B. It is the ability of certain materials to start burning without any flame, spark, heat or ignition source.
C. It is the ability of certain materials to remain unburnt.
D. It is the ability of certain materials to burn without oxygen.

Answer

B

Explanation

Spontaneous combustion takes place without any external source of heat.