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#Question id: 11008


Which of the following events is associated with the first heart sound?

#XL - T Zoology
  1. Closing of the aortic valve
  2. Inrushing of blood into the ventricles during diastole
  3. Opening of the A-V valves
  4. Closing of the A-V valves

Answer:- Option(s): 4


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