Which number of the following represents “Avogadro’s number” best?

Question: Which number of the following represents “Avogadro’s number” best?

Options: 

1602 x 10 ^ (-19)
((A B) – C) / Z
6.022 x 10 ^ 23
a ^ 2 b ^ 2 = c ^ 2

Correct answer:

6.022 x 10 ^ 23

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