For the Gas-Phase Oxidation of Sulfur Dioxide, 2 SO₂ (G) $\degree$

For the gas-phase oxidation of sulfur dioxide, 2 SO₂ (g) +O₂ (g) ⇄ 2 SO₃ (g) , K_p = 4.17 * 10² at 200.0 $\degree$
C.If a closed vessel is filled with SO₃ at an initial pressure of 0.033 atm at 200 $\degree$
C, what is the equilibrium partial pressure of SO₃?

A) more than 0.033 atm
B) less than 0.033 atm
C) 0.033 atm exactly
D) equal to 0.033/4.17 * 10²
E) More information is required.