Moderate

Which of the following is not involved in blood clotting ?

Correct answer: D. Fe+2

  • A. Calcium
  • B. Prothrombin
  • C. Fibrinogen
  • D. Fe+2

Explanation

Calcium, prothrombin and fibrinogen are essential components of the coagulation process. Ferrous iron, Fe2+, is not a normal clotting factor.

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