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Q)

A signature written with carbon pencil weighs 1mg.What is the number of carbon atoms present in signature?

$\begin{array}{1 1}(a)\;6.02\times 10^{20}& (b)\;0.502\times 10^{20} \\(c)\;5.02\times 10^{23}&(d)\;5.02\times 10^{20}\end{array} $

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