The correct option is
C a-iii, b-iv, c-v, d-ii, e-i
Sleep wake cycle is regulated by melatonin which is secreted by pineal gland. a-iii
Induce smooth muscles of the uterus during child birth is done by oxytocin which is secreted by pituitary gland. b-iv
Stimulate process of erythropoiesis is formation of RBC's done by thyroxine which is secreted by thyroid gland. c-v
Regulate balance of water and electrolytes in the body is regulated by aldosterone which is secreted by adrenal cortex of adrenal gland. d-ii
Anti-inflammatory and anti-allergic reactions are controlled by cortisol which is secreted by adrenal cortex of adrenal gland. e-I
So, the correct answer is 'a-iii, b-iv, c-v, d-ii, e-i'.