This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Porosity in amalgam increases because of all except- 
Select and explain. 
A. Undertrituration, B. Undercondensation, C. Regularly shaped particles, D. Insertion of too large increment
C: Regularly shaped particles
Answer: C: Regularly shaped particles 
Explanation: Porosity can be expected and increased by undertrituration, undercondensation, irregularly shaped particles of alloy powder, miscalculated diameter varieties of powder particles to occupy available spaces, insertion of too large increments into the cavity preparation, delayed insertion after trituration or a generally non-wetting, non-plastic mass of amalgam.
Reference: Marzouk Operative dentistry, pg-109