I say B is passenger car and A is motorcycle, while C are trucks based on weight.
C4 could be bus?
That would be correct if this is a driver license. These are just the codes for A. License number (Kenteken: ZF-85-63, this is a classic bike number), Meldcode are the last 4 digits of the frame number
B. Dates of first registration of the bike and in The Netherlands and the registration on my name.
At C. are my personal details like name and address which I removed with Photoshop.
This is probably better: