Which of the following plants exhibit polyembryony?

When a vegetative cell of the zygote forms an embryo,it is called:

Choose the incorrect option regarding apomixis in plants.

What is haploid apogamy?

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.

The reason for using vegetatively reproducing crop plants to maintain hybrid vigour is that: