In angiospermic fertilisation,one male gamete fuses with the egg to form $A$,and this event is called $B$. Identify $A$ and $B$ and choose the correct option.

• A
  $A$-endosperm; $B$-syngamy
• B
  $A$-zygote; $B$-syngamy
• C
  $A$-embryo; $B$-triple fusion
• D
  $A$-endosperm; $B$-triple fusion