Hypokalemia is seen with -a) Frusemideb) Cortisolc) Amilorided) Addison's disease
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a
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ab
Cortisol at high doses may exert certain mineralocorticoid activity leading to increased retention of sodium and water and increased, excretion of potassium. This leads to hypernatremia and hypokalemia.
Furosemide is a loop diuretic that causes increased excretion of potassium leading to hypokalemia.

About other options.

Amiloride is a potassium sparing diuretic and produces hyperkalemia.
Manifestations of Addison's disease occurs primarily due to mineralocorticoid deficiency.