Serum proteins that have been demonstrated to influence bone induction include:
A.	Platelet-derived growth factor
B.	Transforming growth factor-b
C.	Osteogenin
D.	Fibroblast growth factor
Answer:A
Serum proteins that have been demonstrated to influence bone induction include:
A.	Platelet-derived growth factor B.	Transforming growth factor-b C.	Osteogenin D.	Fibroblast growth factor