Which one of the following represents the correct dimensions of the coefficient of viscosity?

The viscous force is given by Newton's law of viscosity:
$$F=\eta A\frac{dv}{dx}$$
Where $\eta$ is the coefficient of viscosity, $A$ is the area, and $\frac{dv}{dx}$ is the velocity gradient.Rearranging for $\eta$:
$$\eta =\frac{F}{A\cdot \frac{dv}{dx}}$$
Dimensions of force $[F]=[ML{T}^{-2}]$ Dimensions of area $[A]=[L^2]$ Dimensions of velocity gradient $\left[\frac{dv}{dx}\right]=\frac{[L{T}^{-1}]}{[L]}=[T^{-1}]$ Substituting the dimensions:
$$[\eta ]=\frac{[ML{T}^{-2}]}{[L^2][T^{-1}]}=[M{L}^{-1}{T}^{-1}]$$