Equlibrium position of which of the following reactions is not affected by change in pressure ?
A. `I_(2(s)) + 5F_(2(g)) to 2IF_(5(g))`
B. `FeO_((s)) + CO_((g)) to Fe_((s)) + CO_((g))`
C. `2Cu(NO_(3))_(2(s)) to 2CuO_((s)) + 4NO_(2(g)) + O_(2((g))`
D. `N_(2)O_(4(g)) to 2NO_(2(g))`
