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: Pediatrics
[{'content': 'Common sites for mongolian spot are –a)  Faceb)  Neckc)  Lumbosacral aread)  Lege)  Thigh \nSelect and explain. \nA. abd, B. cde, C. bde, D. ade', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mongolian spots are blue or slate - gray macular lesions which occur most commonly in pre-sacral area (mainly in lower back & buttocks) but may be found over the posterior thighs, legs, and shoulders.', 'role': 'assistant'}]