Within the Bahrain Flight Information Region (Bahrain FIR), what types of flights and separation services are provided within Class A airspace?

1. IFR and VFR flights are permitted; IFR flights are separated from IFR and VFR flights, while VFR flights receive only traffic information
2. Only IFR flights are permitted; all flights are provided with air traffic control service and are separated from each other
3. Only VFR flights are permitted; no separation service is provided to any aircraft regardless of weather
4. IFR and VFR flights are permitted; separation is provided solely between IFR flights, while VFR flights receive flight information service on request