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
Primary pulmonary hypertension has following features on ECG except - 
Select and explain. 
A. Sinus tachycardia, B. ST elevation, C. Increased Pwave amplitude, D. Right axis deviation
B: ST elevation
Answer: B: ST elevation 
Explanation: None