This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Headache And Migraine, Subject name: Medicine
[{'content': '(HIT)Head impulse test is used to diagnose? \nSelect and explain. \nA. Subarachnoid haemorrhage, B. Lhermite sign, C. Nuchal rigidity, D. Vestibular disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Option A & C ruled out as SAH presents with Nuchal rigidity. Option B- Sudden neck flexion causes shooting pain in the back which is feature of TABES DORSALIS. HIT test is a bedside technique used to diagnose reduction in vestibular function in one ear vs. the other. HINTS exam (Head Impulse, Nystagmus and Test for Skew Detion) can be used to differentiate acute continuous veigo. The 3 components of the HINTS exam include: HINTS Test Reassuring Finding Head Impulse Test Abnormal (corrective saccade) Nystagmus Unidirectional, horizontal Test of Skew No skew detion', 'role': 'assistant'}]