This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': 'The diameter of Tricuspid orifice is \nSelect and explain. \nA. 2cm, B. 2.5cm, C. 3cm, D. 4cm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: ValveDiameter of OrificePulmonary2.5cmAoic2.5cmMitral3cmTricuspid4cmRef: BD Chaurasia; Volume 1; 6th edition; Table 18.1', 'role': 'assistant'}]