In flowering plants, the egg apparatus consists of:

The correct answer is Option (3) → Two synergids and one egg cell

The mature embryo sac (female gametophyte) has 7 cells and 8 nuclei, arranged in a fixed pattern.

Option (1) Three antipodals and one egg cell — Incorrect. The three antipodals lie at the chalazal end, opposite the egg.

Option (2) Two synergids and one central cell — Incorrect. The large central cell with the two polar nuclei lies below the egg apparatus and is not part of it.

Option (3) Two synergids and one egg cell — Correct. These three cells sit at the micropylar end. The synergids have filiform apparatus that guide the pollen tube in.

Option (4) Three antipodals and two synergids — Incorrect. These cells lie at opposite ends of the embryo sac, so they cannot form one group.

NCERT Extract:
The Pistil, Megasporangium (ovule) and Embryo Sac – “… There is a characteristic distribution of the cells within the embryo sac. Three cells are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus, in turn, consists of two synergids and one egg cell. The synergids have special cellular thickenings at the micropylar tip called filiform apparatus, which play an important role in guiding the pollen tubes into the synergid.”