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': 'All of the following are pre-cancerous conditions of the lids except: \nSelect and explain. \nA. Naevi, B. Solar keratosis, C. Xeroderma pigmentosa, D. Carcinoma-in-situ', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Naevi', 'role': 'assistant'}]