Question

A person who deliberately sets fire to a building
a) Arsonist
b) Extortionist
c) Hijacker
d) Assassin​

Answer 1

A person who deliberately sets fire to a building is known as $\boxed{\rm\green{ Arsonist.}}$

The person who does this is specifically called as Arsonist as the act of setting fire or destroying something intentionally or deliberately as they don't possess it is called as arson.

These people have a kind of mental state called Pyromania which gives them relief if they do such things.

Synonyms :

• firebug
• torch