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
Rider's cataract is seen in – 
Select and explain. 
A. Blue dot cataract, B. Zonular cataract, C. Anterior capsular cataract, D. Coronary cataract
B: Zonular cataract
Answer: B: Zonular cataract 
Explanation: The opacity in zonular (lamellar) cataract is usually sharply demarcated and the area of the lens within and around the opaque zone is clear, although linear opacities like spokes of a wheel, called riders may run outwards towards the equator.