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': 'Localization of an object is done by \nSelect and explain. \nA. Paralleling technique, B. Bisecting angle technique, C. Tube shift technique, D. Occlusal technique', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]