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
Investigation of choice for SPINAL METASTASIS? 
Select and explain. 
A. MRI, B. BONE SCAN, C. XRAY SPINE, D. CT scan
A: MRI
Answer: A: MRI 
Explanation: MRI is the Investigation Of Choice for Most spinal imaging including: Spinal metastasis Spinal tumors Potts' spine Intramedullary spinal cord metastasis