This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
The cataract seen in patients with CTG/CUG trinucleotide repeats is 
Select and explain. 
A. Snow flake cataract, B. True exfoliation cataract, C. Christmas tree cataract, D. None of the above
C: Christmas tree cataract
Answer: C: Christmas tree cataract 
Explanation: MYOTONIC DYSTROPHY: CTG/ CUG trinucleotide repeats are seen in myotonic dystrophy. Characteristic cataract may develop with myotonic dystrophy and may be the early feature. In a sharply limited zone of coex underneath the capsule both anteriorly and posteriorly, fine dust like opacities appear interspersed with tiny iridescent spots. The polychromatic dots and flakes in the superficial coex resemble a &;CHRISTMAS TREE&; in appearance. Ref:- Parsons disease s of eye,pg num:-269. Lippincott biochemistry.