Which of the following is a mis-matched pair?

(a)adrenaline : pituitary gland	(b) estrogen : ovary
(c)pancreas : insulin	(d)progesterone : ovary

(a) adrenaline : pituitary gland.

Here, the pair is of Gland and its hormone secretion, where except option (a) all are matched correctly.

Adrenaline hormone is not secreted by the pituitary glands, rather by adrenal glands which are located on top of the kidneys.