Final answer:
The driver of the large vehicle may not see you and could accidentally hit you if you remain in the vehicle's back blind spot.
Step-by-step explanation:
If you remain in the back blind spot of a large vehicle, what is likely to happen is that the driver of the large vehicle may not see you and could accidentally hit you. When driving or even when cycling or motorbiking, it is crucial to stay out of other vehicles' blind spots, especially large ones like trucks or buses. These blind spots are areas around the vehicle where the driver cannot see other vehicles or objects through the mirrors.
The other options provided are incorrect because the driver will not always see you (option 2), is not guaranteed to honk to alert you (option 3), and will not necessarily slow down and let you pass without being able to see you (option 4). It is crucial for all road users to understand the limitations of large vehicle visibility and to avoid blind spots for safety reasons.