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: Surgery
[{'content': 'The commonest clinical pattern of basal cell carcinoma is - \nSelect and explain. \nA. Nodular, B. Morpheaform, C. Superficial, D. Keratotic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Locally invasive carcinoma, arises from the basal layer\xa0of the epidermis\n• MC type of skin cancer\n• 90% of BCC are seen in the face, above a line from the corner of mouth to lobule of ear.\n• MC site: Nose >Inner canthus\xa0of the eye, also known as Tear cancer.\nTypes of BCC\n• Nodular: MC type of BCC, characterized by small slow growing pearly nodules, often with telengiectatic vessels on its surface.\nCentral depression with umbilication\xa0is a classic sign.\n• Pigmented: Mimic malignant melanoma\n• Cystic\n• Superficial', 'role': 'assistant'}]