Which is correct for \( 10 \mathrm{~g} \) of \( \mathrm{CaCO}_{3} \...

Which is correct for \( 10 \mathrm{~g} \) of \( \mathrm{CaCO}_{3} \) ?
a. It contains \( 1 \mathrm{~g} \) atom of carbon
b. It contains \( 0.3 \mathrm{~g} \) atoms of oxygen
c. It contains \( 12 \mathrm{~g} \) of calcium
d. It refers to \( 0.1 \mathrm{~g} \) equivalent of \( \mathrm{CaCO}_{3} \)
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