Among the terms listed below, those that of are not technically correct names for a floral whorl are:

i. Androecium

ii. Carpel

iii. Corolla

iv. Sepal

There are 4 floral whorls namely Calyx, corolla, androecium and gynoecium.

Calyx – is the outermost part whorl of flower parts, consisting of green leaf-like structures called sepals, which covers and protects the petals.

Corolla – is the second whorl of flower parts, which is composed of the flower’s petals.

Androecium - is the male reproductive part of the flower which is an essential whorl of the flower, it is made up of stamens.

Gynoecium - is the female reproductive part of the flower which is also an essential whorl of the flower, it is made up of pistils.

So, in the given list (i) and (iii) are correct names of the floral whorl. The other two are incorrect.

Therefore, the correct answer is (c).