Which of the following plants exhibit polyembryony?

Polyembryony is commonly observed in which of the following species?

In citrus,apomictic embryos are produced from:

Nucellar embryo is

$A$: Multiplication occurs rapidly with equal rate in apomixis as well as in amphimixis.
$R$: Both types show mitotic as well as meiotic division.

Which one of the following is $NOT$ a significance of polyembryony?
$i$. Polyembryony increases the chance of survival of the new plants.
$ii$. Nucellar polyembryony is greatly useful in horticulture.
$iii$. Seedless fruits are formed.
$iv$. Genetically identical plants are produced due to cleavage polyembryony.