This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroradiology, Subject name: Radiology
[{'content': 'Kernohan notch phenomenon is not associated with- \nSelect and explain. \nA. Paralysis contralateral to side of lesion, B. false localising sign, C. Contralateral crus cerebrii compressed by tentorium cerebelli, D. associated transtentorial herniation due to supratentorial mass/lesion', 'role': 'user'}, {'content': "Answer: A \nExplanation: Kernohan phenomenon': Also been referred to as 'Kernohan-Woltman notch phenomenon' and is a false localizing sign, causing paralysis to the ipsilateral side of the lesion occuring due to supratentorial lesion causing transtentorial herniation (mainly uncal -green arrow)causing compression of brainstem and indentation of contralateral crus cerebri against the tentorium cerebelli.", 'role': 'assistant'}]