The correct option is A haploid
In an embryo sac, there are three hapoloid micropylar cells that are collectively known as the egg apparatus. Of the 3 the middle one is larger and is called the egg. The remaining two haploid cells are called synergids or cooperative cells or helper cells. Each of them bears a filiform apparatus in the micropylar region, a lateral hook, chalazal vacuole and a central nucleus.