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': 'MC site of basal cell carcinoma of eyelid: March 2013 \nSelect and explain. \nA. Upper eyelid, B. Lower eyelid, C. Medial canthus, D. Outer canthus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Lower eyelid', 'role': 'assistant'}]