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': 'Available denture bearing area for edentulous maxilla is \nSelect and explain. \nA. 20 cm2, B. 22 cm2, C. 25 cm2, D. 30 cm2', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Researchers have computed the available denture bearing area to be 22.96 cm2\xa0 for maxilla and 12.25 cm2\xa0 for mandible.', 'role': 'assistant'}]