Answer: 
The correct answer would be "it is a characteristics DNA". 
Thymine is one of the four nitrogenous bases present in the DNA. The other three nitrogenous bases are adenine, guanine, and cytosine. It base-pairs with adenine in the double strand structure of the DNA. 
In contrast, In RNA is usually a single strand structure in which uracil is present in place of thymine.