<prompt> Porosity measurements in four types of hand-mixed cements showed that ___ cement had the highest porosity.Resin cementGICZinc phosphate cementPolycarboxylate cement  <response>: Porosity measurements in four types of hand-mixed cements showed that polycarboxylate cement had the highest porosity and resin cement had the least. Zinc phosphate and GICs had intermediate amounts of porosity.Ref: Phillips Science of Dental Materials ed 12 pg 320 