What is the fundamental right-of-way rule when approaching and entering a roundabout in Bahrain?

1. Vehicles entering the roundabout have right-of-way over circulating traffic
2. Give way only to vehicles approaching from your right outside the roundabout
3. Give way to traffic already circulating inside the roundabout approaching from your left
4. Traffic in the rightmost lane always has absolute right-of-way over all lanes