Match the following:

Column $I$	Column $II$
$a.$ Auxin	$(i)$ Root hair formation
$b.$ Cytokinin	$(ii)$ Seed development
$c.$ Ethylene	$(iii)$ Xylem differentiation
$d.$ $ABA$	$(iv)$ Nutrient mobilisation

• A
  $a(iv), b(ii), c(iii), d(i)$
• B
  $a(ii), b(iii), c(i), d(iv)$
• C
  $a(i), b(iii), c(ii), d(iv)$
• D
  $a(iii), b(iv), c(i), d(ii)$