For the Reaction 2 SO₂ (G) + O₂(g) 2

For the reaction 2 SO₂ (g) + O₂(g) 2 SO₃(g) , K c = 0.15 at 300 K. What is the value of K p for this reaction?
(R = 0.0821 L atm/(mol K)

A) 0.15
B) 6.1×10 ^{- 3}
C) 1.6×10²
D) 6.7
E) 3.7