Can an owner of a valid driver’s license for a particular group of vehicle drive any vehicle of the same group?

1. A Yes, provided that the driver can operate and use it proficiently
2. B Yes, holder of a valid driver’s license can drive any vehicle, unconditionally
3. C Yes, provided that he holds a police certificate, testifying that he can operate the vehicle proficiently
4. D Yes, provided that he had not been found guilty of any traffic offence