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': 'Monogolian spots is usually seen at region- \nSelect and explain. \nA. Cervicofacial, B. Lumbosacral, C. Deltoid, D. Thoraco lumbar', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Lumbosacral', 'role': 'assistant'}]