Given above is a diagrammatic sketch of a portion of human male reproductive system. Select correct set of names of parts labelled A, B, C, D respectively.

Thus, the sperm pass through the following structures:
Seminiferous tubules --> epididymis --> vas deferens -->ejaculatory duct --> urethra --> release from body
As sperms travel through the conducting tubes, they mix with secretions from three types of accessory glands. Semen consists of about 200 million sperm cells suspended in the secretions of these glands. The paired seminal vesicles secrete a fluid rich in fructose and prostaglandins into the vasa deferentia. The fructose provides energy for the sperm after they are ejaculated. Prostaglandins stimulate contractions of the uterus, which help move sperm up the female reproductive tract. The single prostate gland secretes an alkaline fluid containing calcium, citric acid,and enzymes. The prostatic fluid may be important in neutralizing the acidic environment of the vagina and in increasing sperm cell motility. During sexual arousal, the paired bulbourethral glands, located on each side of the urethra, release a mucous secretion.