Which gland helps in the lubrication of the penis during coitus?

Which of the following is an accessory reproductive gland?

If the number of somatic chromosomes is $40$,what will be the number of chromosomes in the seminiferous tubule?

Given below are two statements with respect to the prostate gland in males.
$Statement-I$: These are large paired glands, located underneath the urinary bladder.
$Statement-II$: Milky white, slightly acidic prostatic fluid is secreted into the urethra.
Choose the most appropriate answer from the options given below.

What is the location and function of the interstitial cells or Leydig cells?

The cells of $Leydig$ produce and secrete .......... .