Question: Point out the correct answer regarding the hormonal control of reproduction: 
 Options:  <1> The gonadotropin-releasing hormone (GnRH) of the pituitary gland controls the secretion of two gonadotropins from the anterior lobe of the hypothalamus. <2> The gonadotropins are the follicle-stimulating hormone (FSH) and the luteinizing hormone (LH). <3> FSH acts mainly on endocrine cells, stimulating the synthesis of sex hormones. <4> LH is necessary, together with steroid sex hormones, to initiate and maintain gametogenesis. <5> All the above are correct.
2