16.除睪丸外,下列何種內分泌器官亦可分泌少量雄性激素?(A)腦下腺前葉(anterior lobe of pituitary gland)(B)副甲狀腺(parathyroid gland)(C)腎上腺(adrenal gland)(D)甲狀腺(thyroid gland)