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
Oblitration of left cardiac shadow on PA view is due to: 
Select and explain. 
A. Lingular lesion, B. Left hilar lymphadenopathy, C. Left lower lobe lesion, D. Left upper apical lobe lesion
A: Lingular lesion
Answer: A: Lingular lesion 
Explanation: A i.e. Lingular lesion