Under normal physiological conditions in human being every `` 100 \,ml `` of oxygenated blood can deliver ___ `` ml `` of `` O _{2} `` to the tissues.
(A) `` 10 \,ml ``
(B) `` 2\, ml ``

(C) `` 5 \,ml ``
(D) `` 4 \,ml ``