<prompt> Hypernatremia is caused by -PrednisoloneFludrocoisoneHydrocoisoneDexamethasone  <response>: Ans. is b i.e., Fludrocoisone Fludrocoisone has maximum mineralocoicoid activity, so it will cause maximum hypernatremia. Hypernatremia is propoional to the mineralocoicoid efficacy of steroids. 