The correct option is A
Urethra
In human males, the urethra is about 8 inches long and opens at the end of the penis. The urethra provides an exit from the urine (excretory system) as well as for the semen (reproductive system) during ejaculation.
Ureter is the tube that carries urine from the kidney to the bladder.
The vas deferens is a long, muscular tube that travels from the epididymis into the pelvic cavity, to just behind the bladder. The vas deferens transports mature sperm to the urethra in preparation for ejaculation.
Vasa efferentia arise from the rete testis and open into the epididymis and conduct spermatozoa out from the testis.
Therefore, the correct answer is "option a".