Oxytocin and Antidiuretic Hormone (ADH, vasopressin) are synthesized in the hypothalamus and stored/released from the POSTERIOR pituitary. The question uses the imprecise term 'secreted in' but the intended answer is posterior pituitary hormones. Glucagon is from pancreas, insulin is from pancreas - so the pair in the posterior pituitary is oxytocin and ADH.