What category driving license should you have when driving a four-wheeled vehicle other than a light one?

Why?

Of the categories listed, B1 is correct because it allows you to drive a quadricycle other than a light quadricycle. Category A covers motorcycles and category AM vehicles, so it is not sufficient on its own. Category AM allows you to drive mopeds and light quadricycles.

art. 6 ust. 1 pkt 5 lit. a ustawy o kierujących pojazdami