\textbf{202-} The twenty-first electron of the atom ${}^{\ }_{25}\mathrm{Mn}$, according to the Aufbau principle, belongs to which set of quantum numbers?
\begin{align*}
&(1)\quad n = 3,\ l = 2,\ m_l = -1,\ m_s = +\tfrac{1}{2}\\
&(2)\quad n = 3,\ l = 2,\ m_l = -2,\ m_s = +\tfrac{1}{2}\\
&(3)\quad n = 4,\ l = 2,\ m_l = -1,\ m_s = -\tfrac{1}{2}\\
&(4)\quad n = 4,\ l = 2,\ m_l = -2,\ m_s = -\tfrac{1}{2}
\end{align*}