Group-I contains dimensionless parameters and Group-II contains the ratios.

$\begin{array}{ll} \text{Group I} & \text{Group II} \\ \text{P. Mach Number} & \text{1. Ratio of inertial force and gravitational force} \\ \text{Q. Reynolds Number} & \text{2. Ratio of fluid velocity and velocity of sound} \\ \text{R. Weber Number} & \text{3. Ratio of inertial force and viscous force} \\ \text{S. Froude Number} & \text{4. Ratio of inertial force and surface tension force} \end{array}$

The correct match of dimensionless parameters in Group – I with ratios in Group – II is

- $P-3, Q-2, R-4, S-1$
- $P-3, Q-4, R-2, S-1$
- $P-2, Q-3, R-4, S-1$
- $P-1, Q-3, R-2, S-4$