The amino acids are combinations of ketones and alcohol organic acid and amines organic acid and esters esters and aldehydes

 The correct answer is:  [B]:

                         " organic acid and amines " .

Note:  Choice B:  "organic acid and amines" ;

            is the only answer choice that contains "amines" (hint: amino acid / amine) ;  which are "proteins" .

           As such;  Choice "B" is the only  correct answer choice.

Hope this helps!

    Best wishes to you!

6.4 cm (max) - 25 cm (min)