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
Which of the following ECG changes is least likely in a patient with left pneumothorax- 
Select and explain. 
A. Inversion of Twave, B. Left axis deviation, C. Small R wave, D. Electrical alternans
B: Left axis deviation
Answer: B: Left axis deviation 
Explanation: None