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$I.$ Leafy stage is produced from the secondary protonema as a lateral bud
$II.$ They consist of upright, slender axes bearing spirally arranged leaves
$III.$ They are attached to the soil through multicellular rhizoids
$IV.$ This leafy stage bears the sex organ
Which of the statements given above are correct?
$\begin{array}{|l|l|} \hline Column\,\,-I & Column\,\,-II \\ \hline A.\,\,Natural\,\,auxin & 1.\,\,IAA \\ \hline B.\,\,Synthetic\,\,auxin & 2.\,\,NAA \\ \hline & 3.\,\,IBA \\ \hline & 4.\,\,2-4-D \\ \hline \end{array}$
$A - B$
$(i)$ Classification is providing standardized names to organisms such that a particular organism known by the same all over the world.
$(ii)$ Taxonomy is the correct description of an organism and to recognition in its scientific name.
$(iii)$ The system of naming with two components (binomial nomenclature) is proposed by Carolus Linneaus.
$(iv)$ Zoological names are based on International Code for Zoological Nomenclature $(ICZN)$.