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A variety of genetic elements are used in the transgenic plant research. Match the genetic elements (Column-I) with their corresponding source (Column-ll).

$\begin{array}{|l|l|l|l|} \hline & \textbf{Column-I} && \textbf{Column-II} \\ \hline P. & \textit{Ubiquitin 1} \text{ promoter} & 1. & \textit{Agrobactererium tumefaciens} \\ \hline Q. & \textit{Nos} \text{ transcriptional terminator} & 2. & \textit{Streptomyces hygroscopicus} \\ \hline R. &  \textit{bar} \text{ selection marker gene} & 3. & \textit{Escherichia coli} \\ \hline S. & \textit{gus } \text{reporter gene} &  4. & \textit{Zea mays} \\ \hline \end{array}$

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