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: Forensic Medicine
[{'content': 'CSF rhinorrhea is diagnosed by: MP 07 \nSelect and explain. \nA. Glucose estimation, B. Halo sign, C. Immunoelectrophoresis, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. All', 'role': 'assistant'}]