Which of the following answers correctly lists the four main types of macromolecules?

the answer is A because A always goes with T

I think it might be flood because you measure density in water.

<em><u>A.parallel</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>us</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>correct</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em>