Which one of the following events in a botanical garden is never directly influenced by light

The total number of nuclei involved in double fertilization in angiosperms are

Give scientific reasons : Two types of fusions, syngamy and triple fusion take place in embryo sac.

Identify the wrong statements

What is double fertilization in Angiosperms

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