At an unregulated T-intersection of equal roads with no priority signs, which vehicle has right of way?

1. The vehicle traveling on the through road (top bar of the T) automatically has priority over the stem.
2. The general priority-to-the-right rule applies; the through-road driver must yield to a vehicle approaching on their right from the terminating road.
3. The vehicle turning right from the terminating road must wait for all other cars.
4. The vehicle with the highest passenger capacity.