Which of the following factors are responsible for the increase in the rate of a surface catalysed reaction ?
(I) A catalyst provides proper orientation for the reactant molecules
(II) Heat of adsorption of reactants on a catalyst helps reactant molecules to overcome activation energy
(III) The catalyst increases the activation energy of the reaction
(IV) Adsorption increases the local concentration of reactant molecules on the surface of the catalyst.
Select the correct answer using the codes given below:

Options

A. I and II
B. I and III
C. II and IV
D. I,II and IV