<u>Answer:</u> The correct answer is
<u>Explanation:</u>
Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power its stoichiometric coefficients.
For the general equation:
The expression for equilibrium constant is given as:
For the given chemical equation:
The expression for equilibrium constant is:
The concentration of pure solids and liquids is taken as 1, therefore is not written in the given expression.
Hence, the correct expression is given above.