Arrange the given stages of Megasporogenesis in chronological order.(…

The correct answer is Option (4) → (C), (B), (A), (D)

(C) Megaspore mother cell — first. A single cell of the nucellus near the micropyle becomes the megaspore mother cell (MMC). It is diploid and large, with dense cytoplasm.

(B) Megaspore dyad — second. The MMC enters meiosis. The first meiotic division gives two cells, the dyad.

(A) Megaspore tetrad — third. The second meiotic division gives four haploid megaspores. In most flowering plants three of them degenerate and one stays functional.

(D) Female gametophyte — last. The nucleus of the functional megaspore divides mitotically three times. The result is the 7-celled, 8-nucleate embryo sac, the female gametophyte.

NCERT Extract:
Megasporogenesis – “The process of formation of megaspores from the megaspore mother cell is called megasporogenesis. Ovules generally differentiate a single megaspore mother cell (MMC) in the micropylar region of the nucellus. It is a large cell containing dense cytoplasm and a prominent nucleus. The MMC undergoes meiotic division.”
Female Gametophyte – “In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac).”