<u>Answer:</u> The correct answer is Option D.
<u>Explanation:</u>
We are given a nucleus having representation: 
Number of protons = 6
Number of neutrons = 12 - 6 = 6
Number of electrons = 6
To calculate the mass defect of the nucleus, we use the equation:
![\Delta m=[(n_p\times m_p)+(n_n\times m_n)+(n_e\times m_e)]-M](https://tex.z-dn.net/?f=%5CDelta%20m%3D%5B%28n_p%5Ctimes%20m_p%29%2B%28n_n%5Ctimes%20m_n%29%2B%28n_e%5Ctimes%20m_e%29%5D-M)
where,
= number of protons = 6
= mass of one proton = 1.00728 u
= number of neutrons = 6
= mass of one neutron = 1.00866 u
= number of electrons = 6
= mass of one electron = 0.00054858 u
M = Mass number = 12
Putting values in above equation, we get:
![\Delta m=[(6\times 1.00728)+(6\times 1.00866)+(6\times 0.00054858)]-12\\\\\Delta m=0.098931u](https://tex.z-dn.net/?f=%5CDelta%20m%3D%5B%286%5Ctimes%201.00728%29%2B%286%5Ctimes%201.00866%29%2B%286%5Ctimes%200.00054858%29%5D-12%5C%5C%5C%5C%5CDelta%20m%3D0.098931u)
To calculate the binding energy of the nucleus, we use the equation:

(Conversion factor:
)

Hence, the correct answer is Option D.