A personal care product company outsourced four different brands $($A$,$ B$,$ C and

D$)$ of a face cream to four different industry. As per the quality check, the

rheology data at $18\backslash$deg C is given in the Table below. Using the Bingham plastic

model, identify the best brand based on the fluid flow property $($viscosity$)$ which

will give good consumer experience.

Comment on each product $($A$,$ B$,$ C$,$ and D$).$ Take typical value of viscosity for

face cream as $70$ Pa$$s to $100$ Pa$$s at $18\backslash$deg C$.$