Determine the Value Of $\Delta$ G ^$\circ$ for the Reaction 2 NO₂(g)

Determine the value of $\Delta$ G ^$\circ$ for the reaction 2 NO₂(g) $\leftrightarrows$ N₂O₄(g) ,given

A) -4.8 kJ
B) +4.8 kJ
C) +52.3 kJ
D) -52.3 kJ
E) -43.0 kJ