Place the labels in order denoting the sequence of events of the cardiac cycle beginning with passive ventricular filling:
a) Atrial contraction, Isovolumetric contraction, Rapid ejection, Isovolumetric relaxation
b) Passive ventricular filling, Atrial contraction, Isovolumetric relaxation, Rapid ejection
c) Rapid ejection, Isovolumetric relaxation, Passive ventricular filling, Atrial contraction
d) Isovolumetric relaxation, Passive ventricular filling, Atrial contraction, Rapid ejection