In which cell of the embryo sac are the male gametes released?

$A$ long pollen tube is found in $.......$.

Which of the following statements is $NOT$ correct?

When the pollen tube enters the ovule through the integuments,the process is called:

Pollen tube at the time of entering the embryo sac has:

Identify the correct order of events in pollen-pistil interaction from the options given below.
$I.$ Release of male gametes into the embryo sac
$II.$ Deposition of pollen grains on stigma
$III.$ Entry of pollen tube into embryo sac
$IV.$ Development of pollen tube
$V.$ Entry of pollen tube into the ovule