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For a nucleus X A Z having mass number A and atomic number Z A. The surface energy per nucleon (b s ) = – a 1 A 2/3 B. The Coulomb contribution to the binding energy b c = – a 2 3 / 4 A ) 1 Z ( Z − C. The volume energy b v = a 3 A D. Decrease in the binding energy is proportional to surface area. E. While estimating the surface energy, it is assumed that each nucleon interacts with 12 nucleons. (a 1 , a 2 and a 3 are constants) Choose the most appropriate answer from the options given below:

1. B, C, E only
2. C, D only
3. A, B, C, D only
4. B, C only

Correct answer: C, D only

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