Method for getting correct answer? Thank You!

What is Kp for the reaction below, if Kc = 1.13e-3 at 111.2°C?
4A(s) + 5B(g) ↔ 3C(g)

a. 1.36e-5

b. 1.15e-12

c. 1.14e-6

d. 8.42e-3

Kp = Kc(RT)delta n

where delta n = n products - n reactants