Regarding whiplash injury, a true statement includes
Whiplash injury is sprained neck i.e. muscle sprain without bony injury.

Note :

Actually there is injury of neck muscles (not spinal cord). Spinal cord injury may rarely occur. So, no option is absolutely correct. But, option 'c' is the closest one.
Contusion of the spinal cord and fracture of vertebra
Fracture of vertebral body
Spinal cord injury without vertebral fracture
Vertebral fracture without spinal cord injury