False: The ovary is not the main male reproductive organ. The main male reproductive organ is the testes.

The male reproductive system is responsible for producing and delivering sperm, the male reproductive cells. It consists of several organs, including the testes, epididymis, vas deferens, seminal vesicles, prostate gland, and penis.

The testes:
The testes are the main male reproductive organs. They are responsible for producing sperm and the male sex hormone testosterone. Located in the scrotum, the testes are oval-shaped organs that are responsible for the production of sperm through a process called spermatogenesis. They also produce testosterone, which is responsible for the development of secondary sexual characteristics in males, such as facial hair and a deep voice.

The epididymis:
The epididymis is a coiled tube located on the back of each testicle. It serves as a storage and maturation site for sperm. Sperm produced in the testes travel to the epididymis, where they gain the ability to swim and become motile.

The vas deferens:
The vas deferens is a muscular tube that connects the epididymis to the urethra. During ejaculation, sperm travel through the vas deferens and mix with fluids from the seminal vesicles, prostate gland, and bulbourethral glands to form semen.

The seminal vesicles, prostate gland, and bulbourethral glands:
These structures produce fluids that mix with sperm to form semen. The seminal vesicles produce a fluid rich in fructose, which provides energy for sperm. The prostate gland produces a milky fluid that helps to activate sperm and neutralize the acidity of the female reproductive tract. The bulbourethral glands produce a clear, slippery fluid that lubricates the urethra and helps to flush out any urine or remaining sperm.

The penis:
The penis is the external male reproductive organ. It serves as both a conduit for urine and semen and is also involved in sexual intercourse. During sexual arousal, the penis fills with blood and becomes erect, allowing for penetration of the vagina during intercourse.

In conclusion, the ovary is not the main male reproductive organ. The main male reproductive organ is the testes, which are responsible for producing sperm and the male sex hormone testosterone.

Correct answer is option "B"
Because ovary is female reproductive organ and Male reproductive organ is testes
So, answer is false.