This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
The following statement about magnesium are true except:(2000) 
Select and explain. 
A. It is the second most common intracellular electrolyte, B. It plays a major role in glycolysis, C. Sixty percent of body magnesium is in bone, D. Most of the intracellular magnesium is in the muscle
D: Most of the intracellular magnesium is in the muscle
Answer: D: Most of the intracellular magnesium is in the muscle 
Explanation: D, Harper, 25th ed, p. 506, 192