Which of the following will have 46 chromosomes?

The correct answer is Option (4) → Oogonia and spermatogonia

A human body cell is diploid, with 46 chromosomes. Gametes are formed by meiosis, which halves the number. So every cell that comes after the first meiotic division is haploid, with 23 chromosomes.

Option (1) Spermatogonium and secondary spermatocytes — Incorrect. The spermatogonium is diploid (46). But a secondary spermatocyte is formed by the first meiotic division of the primary spermatocyte, so it has only 23.

Option (2) Spermatids and spermatozoa — Incorrect. Spermatids come from the second meiotic division, and they change into spermatozoa (sperms). Both are haploid, with 23 chromosomes.

Option (3) Secondary oocyte and oogonia — Incorrect. Oogonia are diploid. But the secondary oocyte is formed when the primary oocyte completes its first meiotic division, so it is haploid.

Option (4) Oogonia and spermatogonia — Correct. These are the gamete mother cells of the ovary and the testis. They have not yet entered meiosis, so both are diploid with 46 chromosomes.

Note: A similar question was also asked in CUET (UG) 2025 on 02-06-2025 (Slot 2).