To solve this problem, we need to identify which of the given options is a restriction endonuclease. Let's analyze each option:$\newline \bullet$Option 1: Hind II$\newline$ - Hind II is a well-known restriction endonuclease. It is an enzyme that cuts DNA at specific recognition sites.$\newline$ - Restriction endonucleases are essential tools in molecular biology for DNA manipulation.$\newline$ - Therefore, Hind II is a restriction endonuclease.$\newline \bullet$Option 2: Protease$\newline$ - Proteases are enzymes that break down proteins by hydrolyzing peptide bonds.$\newline$ - They are not involved in cutting DNA and are not restriction endonucleases.$\newline \bullet$Option 3: DNase I$\newline$ - DNase I is an enzyme that non-specifically degrades DNA by cleaving phosphodiester bonds.$\newline$ - It is not a restriction endonuclease as it does not cut at specific sequences.$\newline \bullet$Option 4: RNase$\newline$ - RNases are enzymes that degrade RNA molecules.$\newline$ - They do not cut DNA and are not restriction endonucleases.$\newline$Based on the analysis, the correct option is:$\newline$Option 1: Hind II$\newline$This corresponds to the correct option, which is Option 1.