Vaporization of a liquid fuel to a gas that can combust is what category of reaction?

A) Hypothermic
B) Exothermic
C) Endothermic
D) Not enough information to tell

Vaporization

The process by which a liquid or solid substance turns into a gas, often as a result of heating.

Combustible

Capable of catching fire and burning; a characteristic of materials that can ignite under certain conditions, releasing energy and heat.