The driver in the car because a truck is a bigger vehicle and the impact of a truck to a car is more damaging than a car to a truck. Weight difference is the key I think.
The driver in the car because the truck has more mass and sense it has more mass it has a greater acceleration than the car according to Newton’s first law. So the car would get more of an impact causing it to have a higher chance for the driver in the car to be injured!
