This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiac and Pericardiac Imaging, Subject name: Radiology
Which of the follow ing is not a chest radiographic feature of left atrial enlargement? 
Select and explain. 
A. Double left heart border, B. Elevated left main bronchous, C. Splaying of carina, D. Enlargement of left atrila appendage
A: Double left heart border
Answer: A: Double left heart border 
Explanation: Ans. is 'a' i.e., Double left heart border Ref: Sutton 7th/ep. 280; 350]Sings of left atrial enlargementStraightening of left heart border (due to enlargement of left atrial appendage).Elevation of left main bronchus with widening (Splaying) of carina.Double density (atrial) sign.Posterior displacement of esophagus on barium swallow.Prominent posterosuperior part of cardiac shadow.