Consider the Gas-Phase Equilibrium a B

Consider the gas-phase equilibrium A B. In a series of experiments, different initial amounts of A and B are mixed together, and the mixture in each case allowed to come to equilibrium. Which one of these experiments would yield values for the amounts of A and B present at equilibrium different from all the other experiments?

A) 3.0 moles A, 4.5 moles B
B) 4.5 moles A, 3.0 moles B
C) 1.5 moles A, 4.5 moles B
D) 7.5 moles A, no B
E) 0.5 moles A, 7.0 moles B