A learner rider knows a licensed driver normally supervises learner drivers, but there is no passenger seat for supervision on a motorcycle. Which statement is correct?

1. The motorcycle learner is the exception to being accompanied, but still may not carry a passenger
2. The learner must carry a licensed passenger on the pillion
3. The learner may ride only if followed by a car at all times
4. The learner may carry any passenger because supervision is impossible