Which of the following is correct about a catalyst? 

It helps in attaining the equilibrium faster.

A small amount of the catalyst can catalyse a large amount of reactants. A catalyst does not alter Gibbs energy, ∆G of a reaction. It catalyses the spontaneous reactions but does not catalyse non-spontaneous reactions. It is also found that a catalyst does not change the equilibrium constant of a reaction rather, it helps in attaining the equilibrium faster.