This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and electrolytes, Subject name: Medicine
Hyperkalemia without ECG changes may be treated with all except - 
Select and explain. 
A. Calcium gluconate, B. Salbutamol, C. Na bicarbonate, D. Insulin with dextrose
A: Calcium gluconate
Answer: A: Calcium gluconate 
Explanation: calcium gluconate immediately antagonises the cardiac effects of hyperkalemia, whereas the others are used to correct hyperkalemia. (reference : harrisons principles of internal medicine,19E page- 312)