<span>Purines and pyrimidines form hydrogen bonds between each other. Certain polar chemical groups form electrostatic interactions or hydrogen bonds. The A-T and C-G pairings form the hydrogen bonds between the amine and carbonyl groups on the complementary bases.</span>
burn effects like blisters are caused by heat, not temperature. So basically that steam at 100 C contains more heat than water at 100 C but More severe, burn effects come from the gaseous water than the steam.
hopefully this helps, and i deeply apologize if i got this wrong for you
The correct answer is D. by perspiration.