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: Unknown
[{'content': 'Given type of skull is seen in : - \nSelect and explain. \nA. Mongolian, B. Pure Aryans, C. Chinese, D. Europeans', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cephalic Index ( CI ) of various race groups:', 'role': 'assistant'}]