Dimensional Analysis

The dimensional formula of coefficient of viscosity can be expressed as ${\mathrm{M}}^a{ \mathrm{L}}^b{ \mathrm{T}}^c$. What are the values of $a, b$ and $c$.

Which of the following is a dimensionless quantity?

"Gravitational constant $\left(G\right)",$ "Planck's constant $\left(h\right)"$ and Velocity of light $\left(c\right)$ are