Statement-I : $^{12} C$ has atomic mass of exactly 12 atomic mass unit (amu).
Statement-II : One amu is defined as a mass exactly equal to 1/12 of the mass of one carbon-12 atom.
Select the correct option :

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Only statement-II is correct.

Statement-I and II both are incorrect.

Only statement-I is correct.

Both the Statement-I and II are correct.

answer is C.

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Detailed Solution

One atomic mass unit is defined as one-twelfth of the mass of one carbon - 12 atom because C-12 is chosen as the standard atom. This is because it has the equal number of protons and neutrons (6) and constitutes most of the matter.
The most abundant isotope of carbon is Carbon - 12.

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