![Which of the following is required as a component of blood hemoglobin?](https://www.gkseries.com/blog/wp-content/uploads/2022/01/Which-of-the-following-is-required-as-a-component-of-blood-hemoglobin.png)
Q. Which of the following is required as a component of blood hemoglobin?
A. Iron
B. Copper
C. Calcium
D. Magnesium
Answer: Iron
A. Iron
B. Copper
C. Calcium
D. Magnesium
Answer: Iron
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