1. Potassium
  2. Iron
  3. Iodine
  4. Calcium
  5. Sodium
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1 Answers

Option 1 : Potassium

Potassium helps in muscle contraction. Potassium is the eighth or ninth most common element by mass (0.2%) in the human body, so that a 60 kg adult contains a total of about 120 g of potassium. The body has about as much potassium as sulfur and chlorine, and only calcium and phosphorus are more abundant.
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