2.which one of the following mixfures is at equilibrium at a

2.which one of the following mixfures is at equilibrium at a temperature where K下角标p= 2atm上角标负1 for the equilibrium.
2SO下角标2(g)+O下角标2(g)2SO下角标2(g)
┃partial pressure ┃ partial pressure ┃ partial pressure ┃
┃of SO下角标2/atm ┃ of O下角标2/atm ┃ of SO下角标3/atm ┃
A ┃ 1.5 ┃ 4 ┃ 2 ┃
B ┃ 1 ┃ 2 ┃ 1.5 ┃
C ┃ 3 ┃ 2 ┃ 4 ┃
D ┃ 1 ┃ 2 ┃ 2 ┃
compound X decompose upon heating according to the following equation.
2X(s)←→Y（g）+2Z（g）
when 5 mol of X were put into a 1 dm上角标3 container and heated,the equilibrium mixture confained 0.6 mol of Y.
what is the approximate numerical vaiue of the equilibrium constant K下角标e?
A 0.060 B 0.094 C 0.189 D 0.864