i think the answer is d sterilization
Two locations would be the forehead and ear.
The normal potassium level in the blood is 3.5-5.0 milliEquivalents per liter (mEq/L). Potassium levels between 5.1 mEq/L to 6.0 mEq/L are considered to be mild hyperkalemia. Potassium levels of 6.1 mEq/L to 7.0 mEq/L are moderate hyperkalemia, and levels above 7 mEq/L reflect severe hyperkalemia.
Gangrene is definitely not a common symptom.