What is the ratio of purine to pyrimidine bases in each molecule of $DNA$?

The two strands of $DNA$ are

Select the option that represents the organisms in ascending order of their $DNA$ length.

Identify the correct sequence of genetic material in descending order of size (from largest to smallest).

Given below are two statements:
Statement $I$: In prokaryotes,the positively charged $DNA$ is held with some negatively charged proteins in a region called nucleoid.
Statement $II$: In eukaryotes,the negatively charged $DNA$ is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements,choose the correct answer from the options given below:

What is the similarity between $DNA$ and $RNA$?