Choose the statements which correctly indicates functioning of gonads.

(I) Androgens stimulate growth of facial hairs and axillary hairs, muscular growth, low pitch of voice, etc., in males.

(II) Ovary produces one ovum during each menstrual cycle and produces three groups of steroid hormones called endrogens, oestrogen and progesterone.

(III) Androgens influence both male and female sex behaviors’.

(IV) Androgens produce catabolic (synthetic) effects on carbohydrate and protein metabolism .