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': 'The histology of pterygium includes - \nSelect and explain. \nA. Elastotic degeneration, B. Epithelial inclusion bodies, C. Precancerous changes, D. d) Squamous metaplasia of the epithelium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pathologically pterygium is a degenerative and hyperplastic condition of conjunctiva. The subconjunctival tissue undergoes elastotic degeneration and proliferates as vascularised granulation tissue under the epithelium, which ultimately encroaches the cornea. The corneal epithelium, Bowman&;s layer and superficial stroma are destroyed. ref: A K KHURANA OPHTALMOLOGY,E4, Page-80', 'role': 'assistant'}]