Question

which is combustible substance​

Answer 1

Answer:

combustible material is a solid or liquid than can be easily ignited and burned. OSHA, DOT, and other federal regulations, apply specific technical definitions to this term. Combustible solids are those capable of igniting and burning. Wood and paper are examples of such materials.

Answer 2

$\huge\mathtt\red{Answer}$

A combustible material is any material that, in the form in which it is used and under the conditions anticipated, will ignite and burn or will add appreciable heat to an ambient fire.