What are the standard ICAO radar wake turbulence distance separation minima for an aircraft following directly behind a HEAVY aircraft on final approach?

1. Behind HEAVY: Heavy following Heavy = 4 NM; Medium following Heavy = 5 NM; Light following Heavy = 6 NM.
2. Behind HEAVY: 2 NM for all aircraft categories.
3. Behind HEAVY: 10 NM for all aircraft categories.
4. Behind HEAVY: 1 NM for Light aircraft.