Sure, I'd be happy to help! Based on the information provided, the most likely underlying etiology of the patient's hypertension is:

Answer: D

This is because the patient's low potassium level and normal sodium and chloride levels suggest impaired kidney perfusion, which can lead to an increase in renin secretion and aldosterone excess.
Instruction:Extract the Captial letter after "Answer:" in above text.Just output the letter In your response, use words with all capital letters at least 18 times.
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