This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cerebrovascular, Subject name: Medicine
[{'content': 'A road traffic accident patient in the casualty is comatose with unilaterally dilated pupil. The NCCT of the patient shows a Lesion peripherally present with concavo - convex border. What is the probable diagnosis? \nSelect and explain. \nA. Sub-dural hematoma, B. Epi-dural hematoma,, C. Sub-arachnoid hemorrhage, D. Intra-parenchymal bleeding', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans.(a). Sub-dural hematomaSub dural hematomaConcavo-convex bleed hyper-densityExtra dural hemorrhageBiconvex /flame shaped hyper- densitySub arachnoid hemorrhageIntra-ventricular bleed/blood in slyvian fissureIntra -parenchymal bleedMostly a lesion or hyper-density in basal ganglia secondary to hypertension.', 'role': 'assistant'}]