The correct option is C.
In chemistry, a radical is defined as an atom, ion or molecule that possess an unpaired valence electron. Generally, radicals are highly reactive chemically. Examples of radicals are hydroxyl, hypochlorite, nitrate, carbonate, oxalate, permanganate, etc. Free radicals combine with one another or with single atoms to produce neutral substances. In the question given above, the two compounds given in option C have the same type of radical, which is hydroxyl radical.
Answer:
Part 1 i think, im not 100% sure
Explanation:
Energy. The other 90% is lost as heat. This is the second law of thermodynamics.
Cytosine is with guanine, and thymine is with adenine.
