What risks could arise if you drive in the right-hand lane alongside a truck?

Your answer is correct. When driving in the right-hand lane alongside a truck, there are two main risks: you might be unseen by the truck driver because of their limited visibility and large blind spots, and you might overlook other road users, such as cyclists or motorcyclists, who could be in your own or the truck’s blind spots. The danger of being burned by hot exhaust fumes is not considered a significant risk in this context. It's important to be aware of these visibility risks and avoid lingering next to trucks whenever possible.