What is the equilibrium expression for the reaction $P_{4(5)}+50_{(2(g)} \rightleftharpoons P_4O_{10(5)} ? $

Question

$\begin{array}{1 1}(A)\;Kc= [P_4O_{10}]/P_4][O_2]^5 \\(B)\;Kc= 1/[0_2]^5 \\(C)\;Kc=[O_2]^5\\ (D)\; Kc=[P_4O_{10}]/5[P_4][O_2] \end{array} $