The true statement regarding DNA is:
A. contains deoxyribose sugar.
DNA (deoxyribonucleic acid) consists of nucleotides that include deoxyribose sugar, while RNA (ribonucleic acid) contains ribose sugar and uses uracil in place of thymine. DNA typically exists as a double-stranded molecule, so option C is incorrect. Additionally, DNA does not travel to ribosomes for protein synthesis; this process involves mRNA (messenger RNA). Therefore, options B, C, and D are not correct.