How can I use MIE scattering to determine the best particle size to light scattering with glasses?

There is a simple algebraic formula relating turbidity to optical properties. You do not need Mie theory. It is given in van de Hulst "Light scattering from small particles" (a nice cheap reprint from Dover Press). More easily accessible are any of the Mie calculators avaiable on the Internet, say Miecalc, these will give the exact result.

answer: the answer is b

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.