A vibrational-electronic spectrum of homonuclear binary molecules, involving electronic ground state ε'' and excited ε', exhibits a continuum at $$\overline v $$ cm^-1. If the total energy of the dissociated atoms in the excited state exceeds the total energy of the dissociated atoms in the ground state by E_ex cm^-1, then dissociation energy of the molecule in the ground state is

A. $$\frac{{\left( {\overline v + {E_{ex}}} \right)}}{2}$$

B. $$\frac{{\left( {\overline v - {E_{ex}}} \right)}}{2}$$

C. $$\left( {\overline v - {E_{ex}}} \right)$$

D. $$\sqrt {\left( {\overline v - {E_{ex}}^2} \right)} $$

Answer: Option C