Which of the following statements is inaccurate
选项：

A:In the local helix of RNA, the direction between the two strands is also antiparallel.;
B:In double-stranded DNA, the purine base content is always equal to the pyrimidine base content.;
C:DNA in eukaryotic cells only exists in the nucleus;
D:D .The DNA of prokaryotic cells is circular, and the DNA in eukaryotic cells is all linear.