The Schmidt number which is defined as, μ/ρ D, is the ratio of the

Answer: Option A

The Schmidt number (Sc) is a dimensionless number in mass transfer operations.

It is defined as the ratio of momentum diffusivity (kinematic viscosity, μ/ρ) to the mass diffusivity (D).

In mathematical terms, Sc = μ / (ρ D).

This number helps compare the relative effects of momentum and mass transport within a fluid.