STD 12 - 13. biodiversity and conservation — NEET STD 11 Science — Question

$\begin{array}{|p{0.3\linewidth}|p{0.5\linewidth}|} \hline Column\,\,-I & Column\,\,-II  \\ \hline A.\,\,Schleiden & 1.\,\,Nucleus  \\ \hline B.\,\,Schwann & 2.\,\,German\,\,botanist \\ \hline C.\,\,Robert\,\,brown & 3.\,\,Living\,\,cell \\ \hline D.\,\,Leuwen\,\,hoke & 4.\,\,Britain\,\,Zoologist \\ \hline \end{array}$

Choose the correct option for $\mathrm{A}$ and $\mathrm{B}$