Among the terms listed below, those are not technically correct names for a floral whorl are: $i. Androecium \\ii.Carpel \\ iii. Corolla \\iv.Sepal$

Question

$\begin{array}{1 1} \text{a.i and iv} \\\text{b.iii and iv} \\\text{c.ii and iv} \\ \text{d.i and ii} \end{array} $