best way to use Select with prev/next buttons in Material Design

what is the best way to use in Material Design a select with next/prev arrows?

i'm working on an area that there are three select (with many items inside) so i want to let the user able to go to the next or previous select item fast without only use the select dropdown.

i prefer B about visual communication but A is better to distance the select drop down in a touch enviroment.

any advices?