Among the given what change cannot alter the equilibrium concentrations in the reaction 

$N_{2_{\left(g\right)}}+3H_{2_{\left(g\right)}}\rightleftharpoons 2N{H}_{3\left(g\right)} \Delta H=-44.2k.cal$

Addition of catalyst do not alter the equilibrium position.

Formation of ammonia is favoured by the presence of Fe as a catalyst promoted by Mo.

Amount of catalyst and promoter does not alter the position of equilibrium.