Which one produces embryo sac

Embryo sac is

Embryo sac is

Embryo sac is

The embryo sacs are

Eight nucleate embryo sac may be produced by embryo sac of:

Choose the correct answer : Through which cell of the embryo sac, does the pollen tube enter the embryo sac?

Through which cell of the embryo sac, does the pollen tube enter the embryo sac

Through which cell of the embryo sac, does the pollen tube enter the embryo sac

Through which cell of the embryo sac does the pollen tube enter the embryo sac?