Final answer:
The two hormones secreted by the posterior pituitary are antidiuretic hormone (ADH), also known as vasopressin, and oxytocin.
Step-by-step explanation:
The two hormones secreted by the posterior pituitary are antidiuretic hormone (ADH), also known as vasopressin, and oxytocin. These hormones are produced by neurons in the hypothalamus and transported to the posterior pituitary, where they are stored and later released into the bloodstream. The anterior pituitary produces different hormones such as growth hormone, prolactin, thyroid-stimulating hormone, adrenocorticotropic hormone, follicle-stimulating hormone, and luteinizing hormone. Thus, the correct answer to the student's question is 'C. ADH and oxytocin'.