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: Orthopaedics
[{'content': "'Whip-lash’ injury is caused due to \nSelect and explain. \nA. A fall from a height, B. Acute hyperextension of the spine, C. A blow on top to head, D. Acute hyperflexion of the spine", 'role': 'user'}, {'content': 'Answer: B \nExplanation: syn: acceleration injury, cervical sprain syndrome, soft tissue neck injury\n\n* it is an unconventional & inconsequential ligamentous injury of the cervical spine allegedly due to an extension injury following a rear-end collision in an RTA\n* clinical features: symptoms - upper neck pain becomes worse with movement - an occipital headache - neck stiffness - rarely vertigo, auditory or visual disturbance: sign - decreased range of movements - neck muscles spasm\n* investigation - x-ray usually normal. MRI helps to make a diagnosis \n* treatment - conservative', 'role': 'assistant'}]