This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin lesions and disorders of pigmentation, Subject name: Dental
[{'content': 'Causes of localized hypopigmented macule or patch are all except - \nSelect and explain. \nA. Vitiligo, B. Piebaldism, C. Pityriasis alba, D. Freckle', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Freckles are small (>5 mm in diameter), circumscribed, poorly marginated, labile, pale brown macules that appear exclusively on the sun exposed skin of a fair complexioned individual. The term ephelides is also used to describe freckles. others piebaldism, vitiligo and pityriasis alba produce hypopigmentes macules IADVL textbook of dermatology , pigmentary disorders page 772', 'role': 'assistant'}]