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': 'Common sites of mongolian spot are : \nSelect and explain. \nA. Face, B. Neck, C. Lumbo sacral area, D. Leg', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. i.e. Lumbosacral', 'role': 'assistant'}]