GnRH, a hypothalamic hormone , needed in reproduction , acts on
A. Anterior pituitary gland and stimulates secretion of LH and oxytocin
B. Anterior pituitary gland and stimulates secretion of LH and FSH
C. Posterior pituitary gland and stimulates secretion of oxytocin and FSH
D. Posterior pituitary gland and stimulates secretion of LH and relaxin