Deoxyribose.
The sugar found in DNA is a 5-carbon molecule called deoxyribose. The name DNA is short for deoxyribonucleic acid with the deoxyribo telling you which sugar is found in the backbone of DNA.
The backbone of DNA is made of alternating units of deoxyribose sugar and a phosphate group (##PO_4##).
To learn more about the structure of DNA check out this video…
Hope this helps!