Testis and ovary performs dual functions as a primary sex organ as well as an endocrine gland. Select incorrect statements for gonads:

(i) The testis secretes androgens mainly testosterone.

(ii) Androgens stimulate the development, maturation and functions of the male accessory sex organs and secondary sex characters of the male.

(iii) Testosterone stimulates spermatogenesis, male sexual behaviour (libido) and erythropoiesis.

(iv) The ovary secretes estrogen and progesterone.

(v) Estrogen stimulates growth and development of female accessory sex organs and secondary sex characters.

(vi) Progesterone plays a major role in the maintenance of pregnancy as well as in mammary gland development and lactation.

(vii) Testis hormones produce anabolic (synthetic) effects on protein and carbohydrate metabolism.