This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Joint disorders, Subject name: Anatomy
Needle shaped crystals negatively birefringent on polarized microscopy is Characeteristic of which crystal assosciated ahropathy 
Select and explain. 
A. Gout, B. CPPD, C. Neuropathic ahropathy, D. Hemophilic ahropathy
A: Gout
Answer: A: Gout 
Explanation: Crystals of gout ----needle shaped and strongly negative bifringent Crystals of pseudogout -----rhomboid shaped and weakly positive bifringent Refer : Harrinson 20thth/e p 2165 maheswari 9th ed