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: Dental
[{'content': 'Predisposing factors for skin cancer are – a) Smokingb) UV–lightc) Chronic ulcerd) Infrared light \nSelect and explain. \nA. a, B. c, C. bc, D. ad', 'role': 'user'}, {'content': 'Answer: C \nExplanation: UV rays and chronic ulcers are predisposing factors for squamous cell carcinoma of skin.\nNote -Cigarette smoking is predisposing factor for SCC of lips and oral cavity (but not skin).', 'role': 'assistant'}]