This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': "The EEG cabins should be completely shielded by a continuous sheet of wire mesh of copper to avoid the picking of noise from external electromagnetic distrubances. Such a shielding is called as - \nSelect and explain. \nA. Maxwell cage, B. Edison's cage, C. Faraday cage, D. Ohm's cage", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]