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: Social & Preventive Medicine
[{'content': 'Which of the following is a manifestation of magnesium deficiency? \nSelect and explain. \nA. Tetany, B. Hyper reflexia, C. Hypo reflexia, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Magnesium deficiency causes irritability, hyper reflexion and sometimes hyporeflexia, tetany and seizures. Ref: Park 22nd edition, page 577.', 'role': 'assistant'}]