Answer:
The client on continuous nasogastric suction and whose hypertension is being treated with diuretics is at the highest risk for metabolic alkalosis. Metabolic alkalosis is characterized by an elevated pH and increased bicarbonate levels in the blood. This condition can occur when there is excessive loss of acid or an increase in bicarbonate levels. In this case, continuous nasogastric suction can lead to the loss of gastric acid, while the use of diuretics can result in the loss of chloride ions. These factors can contribute to a relative increase in bicarbonate levels, leading to metabolic alkalosis.