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: Dental
[{'content': 'While arrangement of teeth in anterior maxilla, if it is set too far down anteriorly, then which of the sound is most affected? \nSelect and explain. \nA. F, B. V, C. Ch, D. S', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]