Planck’s constant (h), speed of light in vacuum (c) and Newton’s gravitational constant (G) are three fundamental constants. Which of the following combinations of these has the dimension of length ?

A

$$\frac{\sqrt{hG}}{c^{\frac{5}{2}}}$$

B

$$\sqrt{\frac{hc}{G}}$$

C

$$\sqrt{\frac{Gc}{h^{\frac{3}{2}}}}$$

D

$$\frac{\sqrt{hG}}{c^{\frac{3}{2}}}$$