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: Skin
[{'content': 'Which of the following skin condition is related to sunlight exposure? \nSelect and explain. \nA. Actinic keratosis, B. Basal cell carcinoma, C. Molluscum contagiosum, D. Ichthyosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Actinic keratosis are small macules or flesh colored papules which are seen on sun-exposed pas of the body in persons of fair complexion. They are considered premalignant, but only 1:1000 lesions per year progress to become squamous cell carcinomas. Molluscum contagiosum is caused by pox virus. The typical lesions are dome-shaped, waxy papules 2-5 mm in diameter with central umbilication. It is usually seen on the face, lower abdomen and genitals. It is common in patients with AIDS with a helper T cell count < 100/mcL. Ref: Berger T.G. (2013). Chapter 6. Dermatologic Disorders. In M.A. Papadakis, S.J. McPhee, M.W. Rabow, T.G. Berger (Eds), CURRENT Medical Diagnosis & Treatment 2014.', 'role': 'assistant'}]