This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Which of the following is not a measure of stroke volume? 
Select and explain. 
A. Left ventricular end diastolic volume minus left ventricular end systolic volume, B. Ejection fraction times left ventricular end diastolic volume, C. Ejection fraction times cardiac output, D. Cardiac output/hea rate
C: Ejection fraction times cardiac output
Answer: C: Ejection fraction times cardiac output 
Explanation: Stroke vol is the volume of blood pumped from left ventricle per beat SV can be calculated by 1) CO =SV*HR 2)Ejection fraction= SV/ End diastolic. volume 3) SV= EDV-ESV of each ventricle