This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical injuries, Subject name: Forensic Medicine
[{'content': 'One of the following structure is intact in closed head injury? \nSelect and explain. \nA. Scalp, B. Skull, C. Dura mater, D. Arachnoid mater', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Closed head injury (non-penetrating): Damage to the brain without any fracture of the skull and/or penetration of dura; most often results from blunt trauma. Ref - Krishan Vij textbook of forensic medicine and toxicology 5e pg : 281,284', 'role': 'assistant'}]