<prompt> Needle-shaped crystals negatively birefringent on polarized microscopy is characteristic of which crystal associated ahropathy?GoutCPPDNeuropathic ahropahtyHemophilic ahropathy  <response>: Crystal of pseudogout:Made up of calcium pyrophosphateWeakly positive birefringent, rhomboidCrystal of goutMade up of uric acid monosodium urateRefer: Mohindras Fundamentals of Ohopedics, 2nd edition, pg no. 433, 434 