# In which of the following equilibrium $K_c$and$K_p$ are not equal?
( A ) $H_2(g)+I_2 \leftrightharpoons 2Hl(g)$
( B ) $2C_{(s)}+O_{2(g)}\leftrightharpoons2CO_{2(g)}$
( C ) $SO_{2(g)}+NO_{2(g)} \leftrightharpoons SO_{3(g)}+NO_{(g)}$
( D ) $2NO(g)\leftrightharpoons N_{2(g)}+O_{2(g)}$