Match the terms in $\textbf{Group I}$ with the ploidy in $\textbf{Group II}$.

$\begin{array}{|C|l|C|l|} \hline &\textbf{Group I} & {} &\textbf{Group II} \\\hline P. &\text{Disome} & 1. &\text{2n+1} \\\hline Q. &\text{Monosome} & 2. &\text{2n-1} \\\hline R. &\text{Nullisome} & 3. &\text{n-1} \\\hline S. &\text{Trisome} & 4. &\text{n+1} \\\hline\end{array}$

1. $\text{P-4,Q-2, R-3, S-1}$
2. $\text{P-4, Q-3, R-1, S-2}$
3. $\text{P-2, Q-3, R-4, S-1}$
4. $\text{P-l, Q-4, R-3, S-2}$