Which of the following bearing surface combinations in total hip arthroplasty has the lowest volumetric wear rate but carries a risk of catastrophic squeaking and brittle fracture?

Explanation:
Ceramic-on-ceramic (CoC) bearings exhibit the lowest volumetric wear rates among all THA bearing surfaces. However, they are associated with unique complications, most notably audible squeaking and the rare but severe risk of catastrophic brittle component fracture. Reference: The Journal of Arthroplasty.