This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Polychromatic lusture is seen in : 
Select and explain. 
A. Complicated cataract, B. Diabetes mellitus, C. Post radiation cataract, D. Congenital cataract
A: Complicated cataract
Answer: A: Complicated cataract 
Explanation: A i.e. Complicated cataract Complicated cataract (i.e. cataract secondary to some intraocular disease) may be - Anterior coical Q in anterior segmental lesions as glaucoma, acute iritis, or, - Posterior coical Q in posterior segmental lesions as uveitis, RD, pigmentary retinal dystrophy. The second type of complicated cataract presents with posterior coical bread crumb appearance/ polychromatic lusture or rainbow cataract Q Complicated cataract occurs secondary intraocular disease e.g. Inflammatory conditions as uveitis. Degenerative conditions as retinitis pigmentosa, high myopia etc. Intraocular tumors Retinal detachment, Glaucoma etc.