This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal Injuries, Subject name: Orthopaedics
Whip-lash' 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: (b) Acute hyperextension of the spine- Whiplash injury is caused by sudden unexpected hyperextension of cervical spine followed immediately by flexion.