This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Anatomy
[{'content': 'Highest point of iliac crest is seen at; \nSelect and explain. \nA. L3, B. L4, C. S1, D. S2', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Highest point of iliac crest lies at the level of the 4th lumbar veebral body (L4). Clinical significance: Site of bone marrow harvests to collect the stem cells used in bone marrow transplantation. Most ideal donor site forbone grafting when a large quantity of bone is needed. To estimate site for lumbar puncture as LP is done at the level b/w L3-L4 or b/w L4-L5 and highest point of iliac crest coincides with it.', 'role': 'assistant'}]