Following are the terms about activity and selectivity I. Activity is the ability of catalysts to accelerate chemical reactions and selectivity is the ability of catalysts to direct reaction to yield particular product. II. Activity is the ability of catalysts to direct reaction to yield particular products and selectivity is the ability of catalysts to accelerate chemical reactions. Select the correct statement(s).

Activity is the ability of catalysts to accelerate chemical reactions, the degree of acceleration can be as high as 1014 times in certain reactions.(I) 2H2+O2⟶Pt2H2OIn the presence of Pt, reaction takes place violently.(II) In the absence of catalyst, H2 and O2 can be stored indefinitely Selectivity is the ability of catalyst to direct reaction to yield a particular product.The reaction selectivity of zeolites depends upon the size of cavities (cages), pores (apertures) and distribution of pores in the structure.