This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Which of the following is commonest material used to make ohopedic implant 
Select and explain. 
A. Titanium, B. Stainless steel, C. Polyethylene (UHMWPE), D. Methyl-methacrylate
B: Stainless steel
Answer: B: Stainless steel 
Explanation: Most implants are made of stainless steel as it is comparatively cheap and can be easily cast into the desired shape. Titanium is expensive and difficult to fashion into the desired shape. Carbon and polyethylene implants are used only for some specific uses and methyl methacrylate is not made up into an implant as such.