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Which of the following elements is essential for the formation of haemoglobin?

Which of the following elements is essential for the formation of haemoglobin?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Sodium
  • B Potassium
  • C Calcium
  • D Iron
Correct Answer: Option D
Explanation:

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