This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
True about primary aldosteronnism - 
Select and explain. 
A. Pedal oedema, B. Increased renin, C. Increased Na+, D. Decreased K+
D: Decreased K+
Answer: D: Decreased K+ 
Explanation: hypokalemia , diastolic hypeension(retention of sodium) , polyuria , weakness and fatigue are the signs and symptoms ( Harrison 17 pg 2260)