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
[{'content': 'Commonest congenital tumour of conjunctiva is: \nSelect and explain. \nA. Epibulbar dermoid, B. Benign melenoma, C. Papilloma, D. Capillary haemangioma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Epibulbar dermoid', 'role': 'assistant'}]