Which one of these molecules is part of the make-up of both DNA and RNA

Name: Which one of these molecules is part of the make-up of both DNA and RNA
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Phosphate is a component of both DNA and RNA. Both DNA and RNA molecules have a backbone composed of alternating sugar and phosphate molecules. While the sugars are different (deoxyribose in DNA and ribose in RNA), the phosphate group is the same. Thymine is only found in DNA, while uracil is only found in RNA.

Which One of These Molecules Is Part of the Make-Up