This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular System, Subject name: Anatomy
Where is torus aorticus located - 
Select and explain. 
A. Left atrium, B. Right atrium, C. Aorta, D. Left ventricle
B: Right atrium
Answer: B: Right atrium 
Explanation: Ans. is ,'b' i.e., Right atrium o Torus aorticus is a buldge in the right atrial septum sited superiorly and anteriorly,o It is produced due to adjacent nonocoronary aortic sinus at the base of ascending aorta,o It is superior to coronary sinus and anterior to fossa ovalis.