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Assertion : Histones are basic proteins of major importance in packaging of eukaryotic $DNA$. $DNA$ and histones comprise chromatin forming the bulk of eukaryotic chromosome.
Reason : Histones are of five major types $H_1,\,H_2A\,, H_2B,H_3$ and $H_4$ .
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
Solution
Histones are basic proteins found in the eukaryotic chromosomes. These are rich in the amino acids lysine and arginine. Histonie proteins are basic proteins consisting of $5$ types $-H_1,\,H_2A,\,H_2B,\,H_3,\,H_4$. $DNA$ is coiled around it. It exists as octamers linked with $H_1$.
