Which of the following describes 'Special VFR' (SVFR) flight conditions and clearances?

1. A VFR flight authorized by ATC to operate within a control zone in weather conditions below VMC
2. A military flight operating under tactical VFR rules without radar separation
3. A high-speed VFR flight operating above Flight Level 200 without a flight plan
4. A flight that is authorized to land without radio communications in an emergency