What is the relationship between equilibrium concentrations in two similar experiments?
Note that you are not given the equilibrium constant so you do not know the absolute equilibrium concentration of any species at equilibrium.  This eliminates 2 and 4.  

Since all conditions and total concentration of reactants + products are the same between the two experiments, you do know that the concentration of any species in experiment A is equal to that species in experiment B.  Again, only at equilibrium, and you don't know to what degree that equilibrium lies in terms of absolute concentrations.