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
Dispersion of crystalline phase to strengthen ceramics results in 
Select and explain. 
A. dispersed porcelain, B. glazed porcelain, C. aluminium porcelain, D. all of the above
C: aluminium porcelain
Answer: C: aluminium porcelain 
Explanation: None