This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain Imaging: Anatomy, Trauma, and Tumors, Subject name: Radiology
[{'content': 'Investigation of choice to evaluate intracranial hemorrhage of less than 48 hours is - \nSelect and explain. \nA. CT scan, B. MRI, C. PET, D. SPECT', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., CT o Procedure of choice for emergent evaluation of acute intracerebral hemorrhage - CT scan.", 'role': 'assistant'}]