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: Physiology
Isovolumetric relaxation ends immediately after 
Select and explain. 
A. AV Valve doses, B. When ventricular pressure falls below aortic pressure, C. When ventricular pressure falls below atrial pressure, D. None of the above
C: When ventricular pressure falls below atrial pressure
Answer: C: When ventricular pressure falls below atrial pressure 
Explanation: None