Generally,the embryo sac in angiosperms is . . . . . . .

• A
  Bisporic,endosporic,$8$-celled and $7-$nucleated
• B
  Bisporic,exosporic,$7$-celled and $8-$nucleated
• C
  Monosporic,endosporic,$7$-celled and $8-$nucleated
• D
  Monosporic,exosporic,$8$-celled and $7-$nucleated