70. it is experimentally observed that three of the low lying energy levels of an even-even nucleus have spin-parity o, 2 and 4. the ratio of the energies eis f

70. It is experimentally observed that three of the low lying energy levels of an even-even nucleus have spin-parity O, 2 and 4. The ratio of the energies Eis found to be 3.33. This feature can be explained by (A) Shell model (B) Vibrational model (C) Rotational model (D) Fermi gas model