This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
[{'content': 'A 67-year-old business executive and tennis player has a basal cell carcinoma removed from the right cheek. What is TRUE of basal cell carcinoma?Basal cell carcinoma with rolled, pearly borders \nSelect and explain. \nA. It may show a flat ulcer., B. It may metastasize to lymph nodes., C. It may metastasize to remote skin areas., D. It is found exclusively in the head and neck.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The surface of a basal cell carcinoma has a shiny appearance with telangiectasia. Ulcer formation may occur; hence, are named rodent ulcer. Although treatments with 5 FU, cryosurgery, or electrodessication are effective in treatment, surgical excision offers the best results and ensures an accurate diagnosis.', 'role': 'assistant'}]