For the Reaction COCl₂ (G) CO (G) + Cl₂

For the reaction COCl₂ (g) CO (g) + Cl₂ (g) , K p is 2.34 10 - 5 at 500 K.
When 1.20 atm of phosgene (COCl₂ ) is allowed to come to equilibrium at 500 K, what is the pressure of CO?

A) 1.27×10 ^{- 2} atm
B) 1.27×10 ^{- 3} atm
C) 5.29×10 ^{- 3} atm
D) 8.02×10 ^{- 3} atm
E) 0.60 atm