The most significant and essential mineral required for our body is ________.
(a) Iron
(b) Sodium
(c) Calcium
(d) All of the above
Sol: (d) All of the above

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Detailed Solution

(d) All of the above

All the minerals listed—iron, sodium, and calcium—are significant and essential for the proper functioning of the human body. It is impossible to declare one as "most" essential, as a deficiency in any of them can lead to serious health problems.

Iron: Is a critical component of hemoglobin, the protein in red blood cells that transports oxygen from the lungs to the rest of the body.
Sodium: Is an electrolyte that is vital for maintaining fluid balance, nerve function, and muscle contractions.
Calcium: Is the most abundant mineral in the body and is essential for building and maintaining strong bones and teeth, as well as for muscle function and nerve signaling.

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