This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
[{'content': "Iron depostion line at edge of pterygium on corneal epithelium is known as? \nSelect and explain. \nA. Stocker's line, B. KF Ring, C. Fleischer ring, D. Ferrys line", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Along the advancing edge of the pterygium is a yellow-brownidh line (Stocker&;s line) caused by hemosiderin (iron containing) in the epithelial layers. Reference : Parson 22nd edition page :184,185', 'role': 'assistant'}]