Which of the following sets contain atomic numbers of only representative elements?
\[
\begin{aligned}
\text{I.} \quad & 3,\;33,\;53,\;87 \\
\text{II.} \quad & 2,\;10,\;22,\;36 \\
\text{III.} \quad & 9,\;35,\;51,\;88 \\
\text{IV.} \quad & 17,\;25,\;37,\;48
\end{aligned}
\]
The correct answer is
