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: Anatomy
[{'content': 'Hemiplegia is most often caused by thrombosis of : \nSelect and explain. \nA. Anterior cerebral aer, B. Middle cerebral aery, C. Posterior cerebral aery, D. Basilar aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Middle cerebral aeryHemiplegia on opposite half of body is most commonly caused by thrombosis of lenticulo striate branches of middle cerebral aery .', 'role': 'assistant'}]