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
RGD motifs are 
Select and explain. 
A. Fibroblasts, B. Bone Sialoproteins & Osteopontin, C. Cementoblasts, D. Noncementum proteins
B: Bone Sialoproteins & Osteopontin
Answer: B: Bone Sialoproteins & Osteopontin 
Explanation: None