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': 'Stocker s line is seen in - \nSelect and explain. \nA. Pinguencula, B. Pterygium, C. Congenital Ocular Melanosis, D. Conjunctival epithelial melanosis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Deposition of iron seen sometimes in corneal epithelium anterior to advancing head of pterygium is called stocker's line. Pterygium is more common in elderly males doing outdoor work. It may be unilateral or bilateral. It presents as a triangular fold of conjunctiva encroaching the cornea in the area of palpebral apeure, usually on the nasal side but may also occur on the temporal side. ref: A K KHURANA OPHTALMOLOGY,E4, Page-80 ref img", 'role': 'assistant'}]