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
Porcelain denture teeth 
Select and explain. 
A. Have a higher coefficient of thermal expansion than acrylic teeth, B. Have a lower abrasion resistance than enamel, C. Should be used where the inter alveolar clearance is small, D. Have a higher abrasion resistance than gold
D: Have a higher abrasion resistance than gold
Answer: D: Have a higher abrasion resistance than gold 
Explanation: None