Which among the following is an exothermic reaction?
Melting solid salts
Photosynthesis
All of the given options
Reaction during respiration
The process of respiration is :
(a) an oxidation reaction which is endothermic
(b) a reduction reaction which is exothermic
(c) a combination reaction which is endothermic
(d) an oxidation reaction which is exothermic