This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
[{'content': 'All are true statement about spinal cord except \nSelect and explain. \nA. Coccygeal ligament is investing layer of dura over filum terminale, B. Dural sac ends at S2 veebra, C. Cords ends at lower border of L1, D. Filum terminate extends up to coccyx', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Final terminal is the pia connecting conus medullaris to coccyx. Below the end of Dural sac at S2, dura encloses this filum and attaches to coccyx as coccygeal ligament.(Ref: Vishram Singh textbook of clinical neuroanatomy second edition pg 53)', 'role': 'assistant'}]