This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
A 32-year-old patient has a pulmonary vascular resistance of 4 mm Hg/L per minute and a cardiac output of 5 L/min. What is her driving pressure for moving blood through the pulmonary circula on? 
Select and explain. 
A. 10 mm Hg, B. 15 mm Hg, C. 20 mm Hg, D. 30 mm Hg
C: 20 mm Hg
Answer: C: 20 mm Hg 
Explanation: 20 mm Hg DP = R xQ . = 4 mm Hg/L/min x 5 L/min = 20 mm Hg.