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
Rider's caramel is seen in - 
Select and explain. 
A. Blue dot eataract, B. Zonular cataract, C. Anterior capsular cataract, D. Coronary cataract
B: Zonular cataract
Answer: B: Zonular cataract 
Explanation: In zonular cataract the main mass of the lens internal and external to the zone of cataract is clear, except for small linear opacities like spokes of a wheel (riders) which may be seen towards the equator.