Atomic masses of two oxygen isotopes ${ }_8^{16} \mathrm{O}$ and ${ }_8^{18} \mathrm{O}$ are 15.99491 u and 17.99916 u , respectively, where u is the atomic mass unit. Masses of proton and neutron are given by 1.00727 u and 1.00866 u , respectively. The speed of light is $c$. What is the difference between the binding energies of ${ }_8^{18} \mathrm{O}$ and ${ }_8^{16} \mathrm{O}$ nuclei in units of $\mathrm{u} c^2$ ?

• A

  $0.99559$
• Correct answer
  B

  $0.01307$
• C

  $3.01291$
• D

  $2.00425$

Hence, the correct answer is option: 'B'.