Which TWO of the following statements about emergency vehicles are correct? Select TWO

1. ①When an emergency vehicle approaches at or near an intersection, move clear of the intersection and stop temporarily.
2. ②When an emergency vehicle uses the center or left side of the road on urgent duty, its driver need not pay attention to traffic safety.
3. ③An emergency vehicle may use its flashing lights and siren at any time, even when not operating for its emergency purpose.
4. ④When an emergency vehicle approaches somewhere other than at or near an intersection, yield the way so it can pass first.