Detrimen WHY the following statement can occur in DNA ? a. the sequence -A-C-C-T-C-G- may be present in the DNA molecule

c. the ratio A: T and C: G is the same in the DNA molecule

e. the sequence -C-G-U-A-A-G-may be present in the mRNA molecule

f. the sequence -T-G-C-A-C-U- can not occur in the RNA molecule

How can I answer this question ?
Thanks aot​