Rates of Consumption

During the reaction to form ammonia from nitrogen and hydrogen according to the reaction: N2(g) + 3 H2(g) <-> 2 NH3(g), ammonia was being produced at the rate of 1.50 mol.L-1.s-1. What were the respective rates of consumption of nitrogen and hydrogen at this time?

A. N2(g) 1.50 and H2(g) 1.50 mol.L-1.s-1.

B. N2(g) 2.25 and H2(g) 0.75 mol.L-1.s-1.

C. N2(g) 0.75 and H2(g) 2.25 mol.L-1.s-1.

D. N2(g) 3.00 and H2(g) 1.00 mol.L-1.s-1.

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