The Following Chemical Reaction Has Reached Equilibrium

The following chemical reaction has reached equilibrium. 2NO (g) + O₂ (g) 2NO₂ (g)
Calculate the equilibrium constant, Keq, if the concentrations of reactants and products are 1.26 × 10^-10 M for NO, 2.28 × 10^-3 M for O₂, and 9.32 × 10^-6 M for NO₂.

A) 2.40 × 10^-12
B) 3.28 × 10^-7
C) 2.61 × 10^-17
D) 2.40 × 10¹²