what is a exothermic reaction a reaction that requires heat

what is a exothermic reaction

a, reaction that requires heat as a reactant

b. reaction where products have more energy than the reactants

c, reaction where there is a net adsorption of energy from a reaction

d all of these

e none of these

Solution

reaction where products have more energy than the reactants
bcz the reactant have extra energy in the form of heat evolved