Certified Nephrology Nurse Certification (CNN) Practice Exam 2025 - Free Nephrology Nursing Practice Questions and Study Guide

The classification of fruits as high in potassium relies on their mineral content. Bananas are well-known for their high potassium levels, with a medium-sized banana containing approximately 422 mg of potassium. Oranges are also a significant source of potassium; a medium orange can provide around 237 mg. This makes both fruits excellent options for those seeking to increase their potassium intake.

Contrastingly, while strawberries and raspberries do offer some potassium, they are not typically highlighted for their potassium content compared to bananas and oranges. Papayas and grapes also possess potassium, but in lower quantities, making them less notable for someone focusing on high potassium fruits. Cherries and watermelons likewise do not match the potassium levels found in bananas and oranges, which are among the fruits most frequently recognized for being high in this essential mineral. Therefore, considering the actual potassium content in these fruits, bananas and oranges are the correct answer.