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': "Mark the consonant sounds requiring contact between the lips and teeth (labio dentals) \nSelect and explain. \nA. d', 't', 'I', B. b', 'p', 'm', C. 'th', D. f', 'ph', 'v'", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]