Which of the following represents an endothermic reaction? Question 12 options:

A + B --> C + D + Heat

heat pack getting hot

Heat + A + B --> C + D

burning wood

The second one would be one of the application of an endothermic reaction as because endothermic reaction always have the heat in the process to mix the reactants and form the products as here in a burning wood when the wood is supplied with heat then it change into products as ashes and smoke fumes So here due to the heat is involved to form the products thats the reaction is endothermic reaction.

Hope it helps

i think that the answer is c