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: Anatomy
[{'content': 'Area of mitral orifice in adults is \nSelect and explain. \nA. 6-8 cm2, B. 0.5-2 cm2, C. 4-6 cm2, D. 1-4 cm2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The normal area of aoic valve is tz, 3 - 4 cm2 and mitral valve is 4 - 6 cm2Q', 'role': 'assistant'}]