The correct option is C Cowper's gland
Cowper's gland or bulbourethral gland are the accessory paired gland. They are part of the male reproductive system and are of pea size. They contribute to about 0.1 to 0.2 % of the ejaculation as they secrete clear white fluid rich in mucoproteins and therefore perform the accessory function of protecting and preserving the sperm. Thus, the correct answer is option C.