How to create a circle that has a pointer going around it to pick an answer

I’m trying to create a little program that will have a circle in the center that will have different slices on it that are different sizes. And at the click of a button it will pick a choice on it due to the chance. Where do I start

What? Question isn’t clear.

You want a circle with a pointer that rotates around whatever you have selected? Then create a circle with a pointer and rotate it. Or are you trying to create like a pie selection menu? Then make the individual slices and parent them to the same GameObject to rotate them.