31. a system has an unperturbed hamiltonian, in energy units given by 15 0 0 0 0 3 0 0 0 3 0 0 0 0 3 the unperturbed energy eigen values of the system are (a) (

31. A system has an unperturbed Hamiltonian, in energy units given by 15 0 0 0 0 3 0 0 0 3 0 0 0 0 3 The unperturbed energy eigen values of the system are (A) (15, 3, 3,3) (C) (6,3, 15, 9) (B)-3,-15,-3,-3) (D) -3,-3,15,-12)