Consider unsteady fully developed Coutte flow between two infinite parallel plates. This problem involves the following parameters such as velocity component u, distance between the plates h, vertical distance y, top plate speed V, fluid density rho , fluid viscosity mu , and time t .

The number of expected dimensionless parameters pi subscript s of this problem is:

a. 6

b. 5

c. 4

d. 3

e. 2