![Which of the following is necessary to make haemoglobin present in the red blood cells?](https://www.gkseries.com/blog/wp-content/uploads/2022/09/Which-of-the-following-is-necessary-to-make-haemoglobin-present-in-the-red-blood-cells.png)
Q. Which of the following is necessary to make haemoglobin present in the red blood cells?
- Iodine
- Red phosphorus
- Iron
- Sodium
Answer: Iron
Q. Which of the following is necessary to make haemoglobin present in the red blood cells?
Answer: Iron
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