Reena was experiencing headache and dizziness for the last few days. When visited a clinic, the doctor informed that her blood pressure is high. Which of the following hormones will be secreted in the body to reduce the blood pressure?
I.   Aldosterone
II.  Cortisol
III. Atrial Natriuretic factor
IV. Erythropoietin

Atrial Natriuretic factor is released by atrial walls of heart in response to high blood pressure. It dilates the blood vessel thus resulting in reducing blood pressure. Aldosterone is a mineralocorticoid secreted by adrenal cortex. It reabsorbs water and sodium by acting on renal tubules thus maintaining body fluid volume and blood pressure.