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Each 100 mL of human arterial blood carries 'P' mL of O2 and 'Q' mL of CO2, whereas each 100 mL of venous blood carries 'R' mL of O2 and 'S' mL of CO2. Choose the correct values of P, Q, R and S.
P =48 mL; Q=19 - 20 mL; R=52 mL; S = 14 - 15 ml
P= 19 - 20mL; Q= 48 mL; R= 14 - 15mL; S =52 mL
P = 14 - 15mL; Q = 52mL; R = 19 - 20 mL; S = 48mL
P = 52 mL; Q =14 - 15mL; R = 48 mL; S = 19 - 20 mL