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
All except one are each feature of acute pericarditis 
Select and explain. 
A. Concave ST elevation, B. PR segment elevation, C. J point elevation, D. Absent of reciprocal ST depression
B: PR segment elevation
Answer: B: PR segment elevation 
Explanation: Acute pericarditis is characterised by PR segment depression