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': 'Most anteriorly located valve of the hea is \nSelect and explain. \nA. Pulmonary, B. Bicuspid, C. Aoic, D. Tricuspid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]