Which among the following has 23 chromosomes?

Spermatogonia and oogonia are mother cells. So they are diploid. Zygote is also diploid. When the primary oocyte undergoes meiosis-I, it forms one secondary oocyte and the first polar body. Both are haploid cells. Later, the secondary oocyte undergoes meiosis-II to form the ovum and the second polar body. They are also haploid.