Secondary impression with ZoE needed how much spacer thickness in tray?: (A) 0.2 mm, (B) 1.0 mm, (C) 1.5 mm, (D) 2.0 mm
Answer is A. Due to minimal viscosity of Impression plaster and ZoE paste they do not need any spacer in custom tray (Means best option will be 0.0mm).