The energy equivalent of one unified atomic mass unit (1 u) is closest to

1. Use Einstein's mass-energy relation $E = mc^2$. 2. NCERT Example 13.3 computes: $1\,u = 1.66054\times 10^{-27}\,\text{kg}$, $c = 2.998\times 10^{8}\,\text{m/s}$. 3. $E = (1.66054\times 10^{-27})(2.998\times 10^{8})^2 = 1.4924\times 10^{-10}\,\text{J}$. 4. Convert to MeV: $1\,\text{MeV} = 1.602\times 10^{-13}\,\text{J}$, so $E = \dfrac{1.4924\times 10^{-10}}{1.602\times 10^{-13}} = 931.5\,\text{MeV}$. 5. This number is THE standard conversion used in nuclear physics: $1\,u \leftrightarrow 931.5\,\text{MeV}/c^2$. It appears in every nuclear binding-energy calculation. 6. Option A is just $1\,\text{eV}$ in joules (confusing constants). Option C is the numerical value of $u$ itself (in kg) misread as eV. Option D is the typical BE/nucleon value, not the u-equivalent. _Source: NCERT Class 12 Physics Part 2, Ch 13, Example 13.3, p. 6._