Question

Coal : Burn :: Bomb : ?

Answer 1

This is a logical question.

                                    Coal:Burn :: bomb:?

 Which means means if the property of coal is to burn then what is the property of bomb.

Answer is property of the bomb is to explode.  

Therefore the solution of the given question will be coal : burn:: bomb : explosion

Answer 2

Here the answer is$\textbf{explosion}$

This relation can be described as, coal can burn. This means here the nature of coal in described. Similarly, the reaction of bomb can also be its nature that is explosion.