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': 'RGD motifs are \nSelect and explain. \nA. Fibroblasts, B. Bone Sialoproteins & Osteopontin, C. Cementoblasts, D. Noncementum proteins', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]