This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Skin
[{'content': 'Idiopathic guttate hypomelanosis usually occurs over the- \nSelect and explain. \nA. Anterior aspects of legs and forearms, B. Face and ears, C. Flexural regions, D. Extensors', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Anterior aspects of legs and forearmsIGH most frequently occur in sun-exposed areas of the limbs. Solar damage is a factor in these cases. Clinically, the lesions are porcelain-white macules, usually 2-6mm in size but sometimes much larger', 'role': 'assistant'}]