This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiological anatomy, Subject name: Radiology
[{'content': 'The ring is denoting the location of ? \nSelect and explain. \nA. Aoic valve, B. Pulmonary valve, C. Tricuspid valve, D. Mitral valve', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CT scan image shows the area located between Rt Atrium and Rt Ventricle denoting the area of tricuspid valve.', 'role': 'assistant'}]