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: Anatomy
[{'content': 'Lower limit of sacro iliac joint lies upto which level in females ? \nSelect and explain. \nA. 1 to 1 1/2, B. 2 to 2 1/2, C. 3 to 3 1/2, D. 4 to 4 1/2', 'role': 'user'}, {'content': 'Answer: B \nExplanation: , 2 to 2 1/2', 'role': 'assistant'}]