question: The most biocompatible cements to a pulp in decreasing order are:
opa: GIC, ZOE, Polycarboxylate, Zinc phosphate
opb: ZOE and Polycarboxylate, GIC, Zinc phosphate
opc: Polycarboxylate, ZOE, GIC, Zinc phosphate
opd: GIC, Polycarboxylate, ZOE, Zinc phosphate