Under ICAO and KCAA airspace classifications, what air traffic control services are provided to VFR flights operating in Class D airspace?

1. VFR flights are separated from IFR flights and from other VFR flights.
2. VFR flights are separated from IFR flights, but receive only traffic information in respect of other VFR flights.
3. VFR flights receive traffic information in respect of all other flights (IFR and VFR) and traffic avoidance advice on request, but are not separated by ATC.
4. VFR flights receive no ATC service and operate entirely autonomously.