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: Medicine
Sine wave pattern in E.C.G. is seen in- 
Select and explain. 
A. Hypokalemia, B. Hyperkalemia, C. Hyponatremia, D. Hypermatremia
B: Hyperkalemia
Answer: B: Hyperkalemia 
Explanation: None