Compressive strength development due to cement and its fineness are in which relation with each other?

Correct option is C

If the fineness of the cement is greater , surface area of the particles of the cement is also greater. And greater surface area leads to an  increase in rapid hydration reaction.
Hydration reaction is increase so, the strength of development of cement will also increase.
So, increase in fineness of the cement will ultimately lead to increase in development of the strength of the cement.