At the intersection ahead, traffic in which lane must turn left and traffic in which lane may turn left or continue straight ahead?
1) Left lane must turn left, adjoining lane may turn left or continue straight ahead
2) Left lane may turn left or continue straight ahead, adjoining lane must turn left
3) Left lane must turn left, adjoining lane must turn left
4) Left lane may turn left or continue straight ahead, adjoining lane may turn left or continue straight ahead