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
Which of the following is a manifestation of magnesium deficiency? 
Select and explain. 
A. Tetany, B. Hyper reflexia, C. Hypo reflexia, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Magnesium deficiency causes irritability, hyper reflexion and sometimes hyporeflexia, tetany and seizures. Ref: Park 22nd edition, page 577.