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 aoic valve takes place at the : 
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: B i.e. End of isovolumetric contraction