Task: Text Categorization
Input (English): Question: During ventricular systole: 
 Options:  <0> All ventricular blood is expelled. <1> Intraventricular pressure is equal in both ventricles. <2> The ventricular volume begins to decrease from the beginning of the contraction. <3> The atrio-ventricular valves are open. <4> The atria are relaxed.
Output (English): biology