If it takes $1$ second to count $4$ grains of wheat,then the time required to count one mole of wheat grains is ...... years.
- A$1.26 \times 10^{24}$
- B$1.67 \times 10^{-24}$
- C$4.77 \times 10^{15}$
- D$3.34 \times 10^{22}$
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