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
Electrical alterans in ECG is characteristic of 
Select and explain. 
A. Severe bronchial asthma, B. Peri cardial effusion, C. Severe LVF, D. –AR
B: Peri cardial effusion
Answer: B: Peri cardial effusion 
Explanation: None