Final answer:
Exonic DNA is the only option listed that is not non-coding DNA.
Step-by-step explanation:
The correct answer is A. Exonic DNA.
Exonic DNA is a type of coding DNA, meaning it contains the sequences that encode proteins. Non-coding DNA, on the other hand, does not encode proteins or stable RNA products. Intronic DNA, transposon DNA, intergenic DNA, centromeric DNA, and telomeric DNA are all examples of non-coding DNA.