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 cataract is seen in- 
Select and explain. 
A. Blue dot cataract, B. Zonular cataract, C. Anterior capsular cataract, D. Coronary cataract
C: Anterior capsular cataract
Answer: C: Anterior capsular 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, cllaed riders may run outwrds towards the equator. Ref: Parson's 22nd/e p.270&21st/e p.265; Khurana 7th/e p.189.