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: Radiology
Angle of tracheal bifurcation is increased in enlargement of: 
Select and explain. 
A. Right ventricle, B. Left ventricle, C. Right atrium, D. Left atrium
D: Left atrium
Answer: D: Left atrium 
Explanation: Ans. Left atrium