Which element is present in blood plasma in larger quantity?

Sodium

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Potassium

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Iron

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Copper

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Solution

The correct option is B Sodium
Option $(A)$ is correct.
Sodium is present in blood plasma in larger quantity. It is present in extracellular fluid and interstitial fluids.
Hence, even though sodium diffuses into the cell due to the concentration gradient, there is a sodium pump which pushes it back again.

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