This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'A 28 years old male, who was known case of mitral valvular hea disease developed weakness on right side of body which gradually recovered completely over a period of 2 weeks. Blood pressure of the patient was normal and laboratory studies did not reveal any significant abnormality What Is the diagnosis? \nSelect and explain. \nA. TIA, B. Ischemic stroke, C. Hemorrhagic stroke, D. Cerebral salt wasting syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ischemic stroke occurs when a blood clot blocks or plugs an aery leading to the brain. A blood clot often forms in aeries damaged by the buildup of plaques (atherosclerosis). It can occur in the carotid aery of the neck as well as other aeries. Ref Harrison20th edition pg 2433', 'role': 'assistant'}]