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
Stocker's line is seen a  – 
Select and explain. 
A. Pinguecula, B. Pterygium, C. Congenital Ocular Melanosis, D. Conjunctival epithelial melanosis
B: Pterygium
Answer: B: Pterygium 
Explanation: Stocker's line is a line of iron deposition in the corneal epithelium seen adjacent to the head of the pterygium.