How many nuclei are present in embryo sac after fertilization ?

Which of the following is not true for double fertilization

Why do you think the zygote is dormant for sometime in a fertilized ovule?

Explain double fertilisation angiosperms.

$A$ : More than one pollen tubes can enter an embryo sac.
$R$ : Double fertilization can occur by contribution of gametes from different pollen

Definitions / Explanation : Double Fertilisation