This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
Torus aoicus is 
Select and explain. 
A. Bulge in the atria, B. Bulge in aoa, C. Aoic wall tear, D. Septal defect
A: Bulge in the atria
Answer: A: Bulge in the atria 
Explanation: Torus aoicus is a bulge in the atria . Ref - medscape.com