This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Magnetic Resonance Imaging, Subject name: Radiology
[{'content': 'Investigation of choice for SPINAL METASTASIS? \nSelect and explain. \nA. MRI, B. BONE SCAN, C. XRAY SPINE, D. CT scan', 'role': 'user'}, {'content': "Answer: A \nExplanation: MRI is the Investigation Of Choice for Most spinal imaging including: Spinal metastasis Spinal tumors Potts' spine Intramedullary spinal cord metastasis", 'role': 'assistant'}]