For the reversible reaction, N2(g) + 3H2(g) $\rightleftharpoons$ 2NH3(g) + heat The equilibrium shifts in forward direction

Question

For the reversible reaction,
N_2(g) + 3H_2(g) $\rightleftharpoons$ 2NH_3(g) + heat

The equilibrium shifts in forward direction

by increasing the concentration of NH_3(g)

by decreasing the pressure

by decreasing the concentrations of N_2(g) and H_2(g)

by increasing pressure and decreasiing temperature.

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