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
The castability of chromium-cobalt base metal alloys when compared to gold based noble metal alloys is 
Select and explain. 
A. More, B. Less, C. Equal, D. Depends on the alloy type
B: Less
Answer: B: Less 
Explanation: None