What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

1. A. (1) 125 beats per minute
2. B. (2) 50 beats per minute
3. C. (3) 75 beats per minute
4. D. (4) 100 beats per minute

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