(C) is the right answer.
The pituitary gland is located in a bony cavity called sella tursica and is attached to hypothalamus by a stalk (Figure 22.2). It is divided anatomically into an adenohypophysis and a neurohypophysis. Adenohypophysis consists of two portions, pars distalis and par intermedia. The pars distalis region of pituitary, commonly called anterior pituitary,