Which of the following kind of catalysis can be explained by the adsorption theory?

Adsorption theory  explains heterogeneous catalysisModern adsorption theory is the combination of old adsorption theory and intermediate compound theory   Mechanism:Diffusion of reactants to the              Adsorption of reactants              Occurence of chemical reaction         Desorption of products           surface of catalyst                 →       on the surface of catalyst     →  through an adsorption complex      → from the surface of catalyst                                                                                                                                                                              ↓                                                                                                                                                            Diffusion of products away                                                                                                                                                           from the surface of catalyst