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
Prefabricated pontics are commercially available as: 
Select and explain. 
A. Metal pontics., B. Ceramic pontics., C. Porcelain pontics., D. Any of the above.
C: Porcelain pontics.
Answer: C: Porcelain pontics. 
Explanation: None