Nucleic acid is the answer for this problem
I think it is D. because the sun's radiant energy gives life to the earth life forms.
I think the answer is A which is the axon
According to the question, the amount of the drug administered is 250 milligram (mg). The available dose of the drug is 250 mg per 1.5 mL (milligram). So, for the administration of the 250 mg drug, 1.5 mL of the available drug concentration should be used.
We need to determine the amount of the drug must be drawn in cc (cubic centimeter).

As

So, the amount to be drawn is 1.5 cc.