The correct option is A
A. Ovary produces estrogen, progesterone and relaxin. Relaxin is secreted by corpus luteum and causes relaxation of pelvic ligaments and cervix during child birth.
B. Testis produces testosterone which help in development and maintenance of secondary or accessory sexual characters In males.
C. Adrenal gland produces mineralocorticoids, glucocorticoids and gonadocorticoids by adrenal cortex and adrenaline, noradrenaline by adrenal medulla.
D. Pituitary gland produces growth hormone (GH), thyroid stimulating hormone (TSH), adrenocorticotrophic hormone (ACTH), melanocyte stimulating hormone (MSH), prolactin (PRL), follicle stimulating hormone (FSH) and luteinizing hormone (LH).
So, the correct answer is 'Ovary'.