If the energy, E=Gᵖhᵠcʳ, where G is the universal gravitational constant, h is the Planck's constant and c is the velocity of light, then the values of p are q and r are, respectively
A. −1/2,1/2and5/2
B. 1/2,−1/2and−5/2
C. −1/2,1/2and3/2
D. 1/2,−1/2and−3/2