Which of the following differentiates spermatogenesis and oogenesis?
I. Meiosis proceeds continually without pausing in spermatogenesis, while oogenesis involves a meiotic pause.
II. Spermatogenesis only occurs during puberty.
III. Spermatogenesis produces four haploid sperm cells from each diploid precursor cell, while oogenesis produces one egg cell and two or more polar bodies.

The correct option is E I and III only
Oogenesis shows meiotic pause at diplotene stage of prophase I but meiosis proceeds continually in spermatogenesis. In spermatogenesis single primordial germ cell produces four haploid spermatozoa, while in oogenesis single primordial germ cell produces single haploid ovum along with three polar bodies. While spermatogenesis and oogenesis both occur during puberty. Thus option D is the correct answer.