STD 12 - 9. biotechnology principlas and process — NEET STD 11 Science — Question

$I.$ Polymerase Chain Reaction $(PCR)$ is a technique of synthesizing multiple copies of the desired gene in vitro

$II.$ This technique was developed by Kary Mullis in $1985$

$III.$ A single $PCR$ amplification cycle involves three basic steps; denaturation, annealing and extension

Which of the statement given above are correct?

Choose the correct combination of $A$ and $B$

 $\begin{array}{|l|l|} \hline Column\,\,-I  & Column\,\,-II \\ \hline A.\,\,F.\,\,W.\,\,went & 1.\,\,Kinetin \\ \hline B.\,\,E.\,\,Kurosawa & 2.\,\,Gibberellin\,\,acid \\ \hline C.\,\,Skoog\,\,and\,\,Miller & 3.\,\,Auxin \\ \hline D.\,\,Cousin  & 4.\,\,Ethylene \\ \hline \end{array}$

$A - B - C - D$