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
Crucible indicated for casting base metal alloys is: 
Select and explain. 
A. Carbon crucible, B. Clay crucible, C. Quartz crucible, D. High melting plastic crucible
C: Quartz crucible
Answer: C: Quartz crucible 
Explanation: None