This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cataract, Subject name: Ophthalmology
Christmas tree cataract is seen in 
Select and explain. 
A. Atopic dermatitis, B. Diabetes, C. Myotonic dystrophy, D. Alpo syndrome
C: Myotonic dystrophy
Answer: C: Myotonic dystrophy 
Explanation: Christmas tree cataract is seen in myotonic dystrophy Christmas tree cataract These are polychromatic and highly reflective, needle-shaped opacities in the lens seen in myotonic dystrophy. Usually it does not disturb vision.