Which of the Following Are Normal Values for Hemoglobin Saturations $\bar{V}$

Multiple Choice

Which of the following are normal values for hemoglobin saturations and oxygen partial pressures?
I.Arterial oxygen saturation (SaO₂) is approximately 97.5%.
II.PO₂ is 100 mm Hg at SaO₂ of 97.5%.
III.Mixed venous oxygen saturation (S $\bar{V}$ O₂) is normally 75%.
IV. P $\bar{V}$ O₂ is 60 mm Hg at S $\bar{V}$ O₂ of 75%.

A) I, III, IV
B) I, II, III, IV
C) II, IV
D) I, II, III