This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Anatomy
[{'content': 'Dura Mater derives its name from \nSelect and explain. \nA. Leather like appearance, B. Double layered mother, C. Tender mother, D. Tough mother', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (D) Tough mother # Dura mater, or dura, is the outermost of the three layers of the meninges surrounding the brain and spinal cord.> It is derived from Mesoderm.> Other two meningeal layers are the pia mater and the arachnoid mater.> Dura surrounds the brain and the spinal cord and is responsible for keeping in the cerebrospinal fluid.> Name "dura mater" is derived from the Latin "hard mother" or "tough mother", and is also referred to by the term "pachy-meninx".', 'role': 'assistant'}]