The $\Delta$ G $\degree$ _f of Atomic Oxygen Is 230

The $\Delta$ G $\degree$ _f of atomic oxygen is 230.1 kJ/mol.Determine the equilibrium constant for the following reaction at standard thermodynamic conditions: O₂ (g) ⇄ 2 O(g)

A) 4.7 * 10^-41
B) 2.3 * 10^-61
C) 2.1 *10^-81
D) 2.1*10⁴⁰
E) 4.5* 10⁸⁰