Identify the correct sequence of development of ovum in human female.…

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

A. Primary follicle — first. The primary oocyte is surrounded by a layer of granulosa cells. At puberty each ovary still holds 60,000–80,000 of them.

D. Tertiary follicle — second. The primary follicle gains more layers and becomes a secondary follicle. This soon becomes a tertiary follicle, which has a fluid-filled cavity called the antrum.

C. Graafian follicle — third. The tertiary follicle changes into the mature follicle, the Graafian follicle.

B. Ovum — last. The Graafian follicle ruptures at ovulation and releases the ovum (secondary oocyte).

NCERT Extract:
Gametogenesis – “… Each primary oocyte then gets surrounded by a layer of granulosa cells and is called the primary follicle (Figure 2.7). A large number of these follicles degenerate during the phase from birth to puberty. Therefore, at puberty only 60,000-80,000 primary follicles are left in each ovary. The primary follicles get surrounded by more layers of granulosa cells and a new theca and are called secondary follicles.”
Gametogenesis – “… The secondary follicle soon transforms into a tertiary follicle which is characterised by a fluid filled cavity called antrum.”
Gametogenesis – “… The tertiary follicle further changes into the mature follicle or Graafian follicle (Figure 2.7). The secondary oocyte forms a new membrane called zona pellucida surrounding it. The Graafian follicle now ruptures to release the secondary oocyte (ovum) from the ovary by the process called ovulation.”