A disc of radius R rotates at an angular velocity $$Ω$$ inside a disc shaped container filled with oil of viscosity $$\mu$$, as shown in figure. Assuming a linear velocity profile and neglecting shear stress on the outer disc edges, the formula for viscous torque on the disc is

A

$$\frac{\pi \mu Ω R^2}{h}$$

B

$$\pi \mu Ω h R^3$$

C

$$\frac{\pi \mu Ω R^5}{h^2}$$

D

$$\frac{\pi \mu Ω R^4}{h}$$