This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: Ophthalmology
[{'content': 'All of the following are pre-cancerous conditions of the lids except \nSelect and explain. \nA. Solar keratosis, B. Naevus, C. Xeroderma pigmentosa, D. Carcinoma-in-situ', 'role': 'user'}, {'content': 'Answer: B \nExplanation: TUMOURS OF THE LIDS Classification : 1. Benign tumours: These include; simple papilloma, naevus, angioma, haemangioma, neurofibroma and sebaceous adenoma. 2. Pre-cancerous conditions: These are solar keratosis, carcinoma-in-situ and xeroderma pigmentosa. 3. Malignant tumours: Commonly observed tumours include squamous cell carcinoma, basal cell carcinoma, malignant melanoma, and sebaceous gland adenocarcinoma. Ref:- A K KHURANA; pg num:-359', 'role': 'assistant'}]