At an uncontrolled intersection without traffic lights or directional priority signs, what is the right-of-way rule between a vehicle turning left and an oncoming vehicle turning right into the same lane?

1. The right-turning vehicle has priority because it has the shorter turning radius
2. The left-turning vehicle has priority; the right-turning vehicle must yield (右转让左转)
3. Whichever vehicle sounds its horn first takes absolute priority
4. The faster-traveling vehicle has priority