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
Which of the following will produce the most rigid restoration for framework of same dimension? 
Select and explain. 
A. Wrought alloy, B. Palladium alloys, C. Cobalt-chrome alloys, D. Partial denture casting gold in hardened condition
C: Cobalt-chrome alloys
Answer: C: Cobalt-chrome alloys 
Explanation: None