Which of the followin options is correct?

Options

A. `{:("Haploid","Diploid"),("Secondary oocyte","Primary spermatocyte"):}`
B. `{:("Haploid","Diploid"),("Secondary spermatocyte","Secondary oocyte"):}`
C. `{:("Haploid","Diploid"),("Primary oocyte","Secondary spermatocyte"):}`
D. `{:("Haploid","Diploid"),("Ovum","Spermatid"):}`

Answer

A

Explanation

Secondary oocyte is formed by meiotic division of primary oocyte (2n). Therefore, it is haploid. Primary spermatocyte is formed by mitotic divison of spermatogonium (2n), therefore it is diploid.