The Beech 350 can be Class A or B depending on the number of passenger seats.
The rest are class A.
I guess you've read JAR-OPS 1.470 but if not:
Class A are multi-engined aeroplanes powered by turbopropeller engines with a maximum approved passenger seating configuration of more than 9 or a maximum take-off mass exceeding 5700kg, and all multi-engine turbojet powered aeroplanes.
JAR-OPS 1.480, describing terminology, tells us that the maximum approved passenger seating configuration concerns the idividual aeroplane, not the maximum approved for the type.
Hope this is of some help...