To solve this problem, we need to understand the role of GnRH (Gonadotropin-releasing hormone) in the reproductive system.$\newline \bullet$GnRH is a hormone produced by the hypothalamus.$\newline \bullet$It is responsible for stimulating the anterior pituitary gland.$\newline \bullet$The anterior pituitary gland, upon stimulation by GnRH, secretes two key hormones: Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH).$\newline \bullet$These hormones play crucial roles in the regulation of the reproductive processes, including ovulation and spermatogenesis.$\newline$Now, let's evaluate the options:$\newline \bullet$Option 1: Anterior pituitary gland and stimulates secretion of LH and FSH.$\newline$ - This is correct as GnRH acts on the anterior pituitary to release LH and FSH.$\newline \bullet$Option 2: Posterior pituitary gland and stimulates secretion of oxytocin and FSH.$\newline$ - This is incorrect because GnRH does not act on the posterior pituitary, and oxytocin is not stimulated by GnRH.$\newline \bullet$Option 3: Posterior pituitary gland and stimulates secretion of LH and relaxin.$\newline$ - This is incorrect because GnRH does not act on the posterior pituitary, and relaxin is not stimulated by GnRH.$\newline \bullet$Option 4: Anterior pituitary gland and stimulates secretion of LH and oxytocin.$\newline$ - This is incorrect because oxytocin is not secreted by the anterior pituitary in response to GnRH.$\newline$Therefore, the correct answer is Option 1: Anterior pituitary gland and stimulates secretion of LH and FSH.