This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
Whiplash injury is caused due to - 
Select and explain. 
A. A fall from a height, B. Acute hyperextension of the spine, C. A blow on top to head, D. Acute hyperflexion of the spine
B: Acute hyperextension of the spine
Answer: B: Acute hyperextension of the spine 
Explanation: Whiplash injury results from acute hyperextension of the cervical spine in the region of C4-C6 vertebrae.
Note: Both hyperflexion and hyperextension (i.e. flexion followed by hyperextension) are involved in the mechanism of whiplash injury. But it is hyperextension which causes damage to the spinal cord.