MCQ
One $\text{a.m.u}$ is defined as mass of :
- A$\frac{1}{16}^{\text{th}}$ mass of one oxygen atom
- B$\frac{1}{14}^{\text{th}}$ mass of one atom of nitrogen
- ✓$\frac{1}{12}^{\text{th}}$ mass of one carbon $-12$ atom
- DNone of above
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(Rounded off to the nearest integer) [Given : Atomic weight in $g\, mol ^{-1}- Na : 23$; $N : 14 ; O : 16]$