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
During the cardiac cycle the opening of the aortic valve takes place at 
Select and explain. 
A. Beginning of systole, B. End of isovolumetric contraction, C. End of Diastole, D. End of diastasis
B: End of isovolumetric contraction
Answer: B: End of isovolumetric contraction 
Explanation: None