What is the meaning of an inverted triangular sign pointing downward with a red border and white background (Znak 'Ukrštanje sa putem sa prvenstvom prolaza' / Yield sign)?

1. Yield the right-of-way to all vehicles moving on the intersecting priority road
2. Mandatory stop in all cases even when the road is completely clear
3. You have priority over all traffic coming from the right
4. End of motorway speed limit