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If 2.0 bar of He (g) was introduced to the following closed system at equilibrium what...

If 2.0 bar of He (g) was introduced to the following closed system at equilibrium what would happen?

N2 (g) + 3H2 (g) ⇌ 2NH3 (g)

a. Only the value of Keq would change.

b. The total pressure would change and the equilibrium would shift to favour the reactants.

c. The total pressure would change and the equilibrium would change to favour the products.

d. The total pressure would change however the equilibrium would not change.

e. The total pressure would not change and the equilibrium would not change.

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