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 lustre 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: The earliest finding of complicated cataract is a polychromatic luster at the posterior pole of lens.