Match the dimensionless numbers in $Group–I$ with the ratios in  $Group–2$.

$\begin{array}{cc}\\ &\text{Group-1} & \text{Group-2} \\ &\text{P. Biot number} & \text{ I.$\frac{buoyancy force}{viscous force}$} \\ &\text{ Q. Schmidt number} & \text{II.$\frac{internal thermal resistance of a solid}{boundary layer thermal resistance}$} \\ &\text{R. Grashof number} & \text{III.$\frac{momentum diffusivity}{mass  diffusivity}$} \\ \\ \end{array}$

1. $P-II$, $Q-I$, $R-III$
2. $P-I$, $Q-III$, $R-II$
3. $P-III$, $Q-I$, $R-II$
4. $P-II$, $Q-III$, $R-I$

in Others
edited