Arrange the given parts of embryo sac starting from chalazal to micro…

The correct answer is Option (2) → (B), (C), (A), (D)

A mature embryo sac has 8 nuclei but only 7 cells. Three cells are at the chalazal end, two polar nuclei are in the large central cell, and three cells are at the micropylar end.

(B) Antipodals — come first. These are the three cells at the chalazal end.

(C) Polar nuclei — come second. The two polar nuclei lie in the large central cell, below the egg apparatus, so they are in the middle of the sac.

(A) Synergids — come third. The two synergids, together with the egg cell, form the egg apparatus at the micropylar end.

(D) Filiform apparatus — comes last. These are special thickenings at the micropylar tip of the synergids. They help to guide the pollen tube into the synergid, and so they lie at the very end of the sac.

Note: A similar question was also asked in CUET (UG) 2026 on 15-05-2026 (Slot 1).

NCERT Extract:
The Pistil, Megasporangium (ovule) and Embryo Sac – “… Six of the eight nuclei are surrounded by cell walls and organised into cells; the remaining two nuclei, called polar nuclei are situated below the egg apparatus in the large central cell. 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. Three cells are at the chalazal end and are called the antipodals. The large central cell, as mentioned earlier, has two polar nuclei.”