A Crystal with Long, Thin, Needlelike, Pointed Ends Is Identified

Multiple Choice

A crystal with long, thin, needlelike, pointed ends is identified in synovial fluid. The crystals are located inside and outside the cells. A quartz compensator is used, and it determines that the crystals are negatively birefringent and are a yellow color when parallel to the axis of the compensator. The crystal is blue when turned perpendicular to the axis of the compensator. What is the type of crystal?

A) Monosodium urate
B) Calcium pyrophosphate
C) Cholesterol crystals
D) Pseudogout