The correct answer is option 'B', sperms.

The testes are the primary male reproductive organs responsible for the production of male gametes, or sperm cells. They are located in the scrotum, which is a sac-like structure outside the body cavity that helps maintain a lower temperature necessary for sperm production.

The process of sperm production in the testes is called spermatogenesis. It involves the division and differentiation of germ cells, which eventually develop into mature sperm cells. Spermatogenesis occurs within the seminiferous tubules, which are long, coiled structures present in the testes.

Here are the key points regarding the production of sperms in the testes:

1. Testes structure: The testes are made up of numerous tiny tubules called seminiferous tubules. These tubules are surrounded by interstitial cells, which produce testosterone, the male sex hormone.

2. Germ cells: Within the seminiferous tubules, there are specialized cells called germ cells. These cells undergo a series of divisions and differentiations to form sperm cells.

3. Spermatogonia: The germ cells start as diploid cells called spermatogonia. They divide by mitosis to produce more spermatogonia, ensuring a continuous supply of germ cells.

4. Primary spermatocytes: Some spermatogonia undergo further divisions and differentiate into primary spermatocytes. These cells are still diploid, and each primary spermatocyte contains a complete set of chromosomes.

5. Meiosis: The primary spermatocytes undergo meiosis, a specialized type of cell division that reduces the chromosome number by half. This results in the formation of secondary spermatocytes.

6. Secondary spermatocytes: The secondary spermatocytes are haploid cells, meaning they contain half the number of chromosomes compared to the original germ cells. Each secondary spermatocyte contains only one set of chromosomes.

7. Spermatids: The secondary spermatocytes then undergo the second round of meiosis to produce spermatids. These spermatids are also haploid and contain only one set of chromosomes.

8. Sperm cell differentiation: The spermatids undergo a series of structural changes to develop into mature sperm cells. This process, known as spermiogenesis, involves the formation of a tail, the development of a streamlined shape, and the shedding of excess cytoplasm.

9. Release of sperm: Once the sperm cells are fully mature, they are released into the lumen of the seminiferous tubules. From there, they travel through a series of ducts, including the epididymis, vas deferens, and urethra, before being ejaculated during sexual intercourse.

In summary, the testes produce male gametes called sperms through the process of spermatogenesis. This complex process involves the division and differentiation of germ cells within the seminiferous tubules. The mature sperm cells are then released from the testes and transported through the male reproductive system for potential fertilization of an egg.