This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plastic Surgery and Skin Lesions, Subject name: Surgery
[{'content': 'Characteristic feature of basal cell carcinoma is: \nSelect and explain. \nA. Keratin pearls, B. Foam cells, C. Nuclear palisading, D. Psammoma bodies', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Characteristic features of basal cell carcinoma are: Low grade malignancy. More common in fair & dry skinned people . NUCLEAR PALISADING on histology. Exposure to sunlight is an impoant etiological factor . Has been seen following prolonged administration of Arsenic.', 'role': 'assistant'}]