Directions: In the following question, there are two statements, Assertion (A) and Reason (R). Consider both the statements independently and choose the appropriate option.

Assertion (A): Aldosterone is a mineralocorticoid. Reason (R): It helps in the maintenance of electrolytes, body fluid volume, osmotic pressure and blood pressure.

Correct answer. Corticoids which regulate the balance of water and electrolytes in our body are called mineralocorticoids. Aldosterone is the main mineralocorticoid in our body. Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na⁺ and water and excretion of K⁺ and phosphate ions. Thus, aldosterone helps in the maintenance of electrolytes, body fluid volume, osmotic pressure and blood pressure.