Every 100 ml of oxygenated blood can deliver around ___X___ of O₂ to the tissues  and every 100 ml of deoxygenated blood delivers approximately ___Y___ of CO₂ to the alveoli. Mark the correct set of X and Y.

• A

  X - 4 ml ; Y - 4 ml

• B

  X - 5 ml ; Y - 5 ml

• C

  X - 5 ml ; Y - 4 ml

• D

  X - 4 ml ; Y - 5 ml