This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain Imaging: Inflammatory, Infectious, and Vascular Diseases, Subject name: Radiology
[{'content': 'Epidermoid cyst can be differentiated from arachnoid cyst by - \nSelect and explain. \nA. MRI, B. USG, C. Myelography, D. CT scan', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., MRI o Myelography cannot differentiate reliably between an epidermoid cyst and a noncommunicating arachnoid cyst,o It has largely been replaced by MRI.", 'role': 'assistant'}]