Medicine Hypokalemia is defined as a plasma potassium concentration of A < 3.5 mmol/L B < 3.6 mmol/L C < 3.7 mmol/L D < 3.8 mmol/L 💡 Explanation Hypokalemia is defined as a plasma potassium concentration of ✓ Correct Answer: A. < 3.5 mmol/L