A.Ca6(PO4)2(OH)10 B.Ca2(PO4)6(OH)10 C.Ca6(PO4)10(OH)2 D.Ca10(PO4)6(OH)2 E.Ca10(PO4)2(OH)6
A.1% B.2% C.3% D.4% E.5%
A.86% B.12% C.2% D.96%~97% E.70%