This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
In left sided massive pneumothorax, ECG shows all, except- 
Select and explain. 
A. Left axis detion, B. Absent R wave, C. Peaked P wave, D. Precordial T wave inversion
A: Left axis detion
Answer: A: Left axis detion 
Explanation: Abnormal left axis detion in left-sided pneumothorax. Relevant QRS abnormalities (incomplete RBBB and T-wave inversion) in(10%). QRS amplitude in V2-V6 leads was significantly decreased in left-sided pneumothorax. Ref Harrison 20th edition pg 1546