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': 'Oral examination of an edentulous patient should include digital palpation. Why? \nSelect and explain. \nA. The arch form is more accurately evaluated, B. Undercut areas may be better evaluated, C. The ridge relationship may be better evaluated, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]