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Q.

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a

Carbon : % weight in earth’s crust < % weight in human body

b

Magnesium : % weight in earth’s crust > % weight in human body

c

Sulphur : % weight in earth’s crust < % weight in human body

d

Sodium : % weight in earth’s crust < % weight in human body.

answer is D.

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Sodium of earth crust is 2.8% and in human body 0.2%.
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Mark the incorrect option.