When approaching a public bus that has activated its left turn signal to pull out from a marked bus stop in a built-up area (naselje), what must you do?

1. Slow down and, if necessary, stop to allow the bus to safely re-enter the traffic lane
2. Accelerate quickly and honk to pass before the bus pulls out
3. Force the bus to wait until all trailing motorcycles have passed
4. Overtake the bus on the right side using the bus bay shoulder